Question

How to find third proportional

Answer 1

Hello!

How to find third proportional?

Let the three no be a , b and c

Then

a : b = b : c

From here we can calculate c.

Example

a = 12

b = 18

c = ?

$\frac{12}{18} = \frac{18}{c} \\ \\ c = 27$

Thanks!

Answer 2

the third proportional of two numbers a and b is defined to be that number c such that a:b=b:c