Question

find the 3rd proportional of 8 and 12

Answer 1

Let the third proportion be x....
So,
8/12=12/x
144= x × 8
So,

x= 144/8
x= 18


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Answer 2

Answer:

Let the third proportional = x.

8,12 and x are in continued proportion

8,12=12

              OR

8x=12×12

                OR

x=12×128 or, x=18

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