Question

find the third proportion of the following 5, 10​

Answer 1

Answer:

Let x be the third proportional to 5,10

then 5:10::10:x

therefore 5×x = 10× 10

X= 10×10 / 5

X= 20

Third proportional= 20

Answer 2

Consider x as the third proportional to 5, 10

5: 10 :: 10: x

It can be written as

5 × x = 10 × 10

x = (10 × 10)/ 5 = 20

Hence, the third proportional to 5, 10 is 20.