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The first three terms of a proportion...

The first three terms of a proportion are `3,5` and 21 respectively. Find its fourth term.

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RD SHARMA ENGLISH-RATIO AND PROPORTION-All Questions
  1. Are 4, 12 , 36 in continued proportion?

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  2. If\ 3: x :: 12 : 20 ,\ find the value of xdot

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  3. The first three terms of a proportion are 3,5 and 21 respectively. ...

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  4. What must be added to the number 6, 10 , 14 and 22 so that they are...

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  5. For every 12 mangos that I buy, 3 turn out to be rotten. At this ra...

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  6. The scale of a map is 1: 3000000. what is the actual distance betwe...

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  7. If three loaves of bread are consumed by 9 people, how many people ...

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  8. Find which of the following are in proportion? (i)33,44,66,88  (ii)...

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  9. Find x\ in the following proportions: (i)16 : 18=x : 96 (ii) x :...

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  10. The ratio of the income to the expenditure of a family is 7: 6. Fin...

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  11. The scale of a map is 1: 4000000.\ What is the actual distance bet...

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  12. The ratio of income of a person to his savings is 10 : 1. If his sa...

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  13. An electric pole caste a shadow of length 20 metres at a time when ...

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  14. If a : b=3:4, then 4a :3b= (a)4:3 (b) 3:4 (c)1:1 (d) None of th...

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  15. 1/12 :1/60 =       (a) 4:1 (b) 1:4 (c) 5:1 (d) 1:5

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  16. The simplest form of 24 : 36\ i s (a)9:4\ (b) 4:9 (c)3:2 (d) 2:3

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  17. If a : b=4:5 and b : c=2:3, then a : c (a)4:3 (b) 8: 15 (c) 8:9 ...

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  18. If p : q=2:5, then (25 p+14 q)/(5p+7q)= (a)8:5 (b) 5:8 (c) 8:3 ...

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  19. A ratio equivalent to 2:5 is (a)6: 15 (b) 4:5 (c) 5:2 (d) 5:4

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  20. If 2a=3b=4c , then a : b : c= (a)2:3:4 (b) 3:4:6 (c)4:3:2 (d) ...

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