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Find a such that 3, a, 9, and 12 are in ...

Find a such that 3, a, 9, and 12 are in proportion.

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The correct Answer is:
a = 4
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ICSE-RATIO AND PROPORTION-Revision Exercise
  1. Write the following ratios in their simplest form. a. 36:81 b. 48:108 ...

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  2. Write three equivalent ratios for each of the following: 2:7 3:7 5:6 4...

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  3. Find the ratio of: a. 455 mL to 1.5 L. b. 45 min to 3(1)/(30) h.

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  4. A cake recipe uses 150 g sugar in 400 g of flour. Find the ratio of: a...

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  5. Divide: a. रु 600 between A, B, and C in the ratio 2:3:7 b. रु 780 a...

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  6. Arrange the given ratios as indicated: a. In ascending order: i. 2...

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  7. Arrange the given ratios as indicated: a. In ascending order: In d...

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  8. If P=3Q = 7R, find P:Q:R.

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  9. If P:Q = 2:9 and Q :R = 3:7, find P:R.

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  10. Given that x:y= 2:7, find 3x + 4y: 2x + 5y.

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  11. Two numbers are in the ratio 4:7 and their LCM is 84. Find the two num...

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  12. Jyoti's and Geeta's present ages are in the ratio of 1:4. After 16 yea...

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  13. Two bags of potatoes are such that the weight of one bag is 5.5 times ...

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  14. A cleansing agent is mixed with water in the ratio 1:7. In 400 L of so...

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  15. In a mixed fruit drink, orange juice, apple juice, and pineapple juice...

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  16. Yellow, blue, and white colours are mixed in the ratio 7:6:3. How much...

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  17. Find a such that 3, a, 9, and 12 are in proportion.

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  18. What should be added to each of the numbers 8, 32,and 1,11 so that the...

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  19. Are the following numbers in continued proportion? a. 9, 12, 16 b. 4, ...

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  20. A bag has 50, 100, and 200 notes in the ratio 3:7:5. If there are 90 n...

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