Question

Find the fourth proportional in each of the following:3, 5, 21​

Answer 1

QUESTION :

Find the fourth proportional in each of the following:3, 5, 21, ?

ANSWER :

3, 5, 21, ?

= 3 : 5 :: 21 : x

= 3/21 = 5/x

= 1/7 = 5/x

x = 7 * 5

x = 35

Therefore, the fourth proportional is 35.

FINAL ANSWER : 35