मीन प्रोपोर्शनल बिटवीन 9एंड 16
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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 x 16
x2 : 144
Therefore, x = 12.
So, the mean proportional of 9 and 16 is 12.