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Find a fourth proportional to the numbers 3, 9, 8.
Question

Find a fourth proportional to the numbers 3, 9, 8.

A.

10

B.

12

C.

20

D.

24

Correct option is D

a : b :: c : x

Then fourth proportional x =bca\frac{bc}{a}​​

Fourth proportional = 9×83=24\frac{9×8}{3}= 24​​

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