Question

the mean of proportional to 16 and 9 is a) 14 b) 36 c) 12 d) 18​

Answer 1

Answer:

c) 12

Step -by -step explaination

To answer this question, one should know what is proportion and what is mean proportional.

when four numbers say A,B,C,D are in similar quantities such that A:B= C:D then they are said to be in proportion.

when A,B,C are in continued proportion then B is said to be the mean proportional.

let us take A=9 and C=16 and B as X. then

A:X : : X:C

9:X : : X:16

x2 = 9 multiply by 6

x2= 144

Therefore, x = 12.

So, the mean proportional of 9 and 16 is 12.

So c is the right answer.

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