If 3 : 4 and 9 : x are in direct proportion, then what is the value of – InterviewSolution

1.

If 3 : 4 and 9 : x are in direct proportion, then what is the value of x?

Answer»

If 3 : 4 and 9 : x are in direct proportion, then their ratio is constant.

∴ 3/4 = 9/x

⇒ 3 × x = 4 × 9

⇒ x = 4 x 9/3 = 12

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