What must be added to each of the numbers 3, 7, 8 and 16 so that resulting numbers are in proportion ?

What number should be added to each of the number 6, 14 , 18 , 38 so that the resulting numbers are in proportion ?

What number should be added to each of the number 103 , 135 , 110 and 144 so that the resulting numbers are in proportion ?

What number should be added to each of the number 6,7,15,17 so that the resulting numbers are in proportion ?

What should be added to each of the numbers 13 , 17 and 22 so that the resulting numbers are in continued proportion ?

What should be added to each of the numbers 8, 32,and 1,11 so that the new numbers are in proportion?

What number must be added to each of the numbers 7,11 and 19 so that the resulting numbers may be in continued proportion? 3 b.-3 c.4 d.-4