Question

if 28 is the third proportion of 7 and X. what is the value of X?​

Answer 1

Answer:

hi there it is for you

Step-by-step explanation:

Third proportional 'c' = a:b::b:c

Then, 7 : x :: x : 28

So, 7/x = x/28

x² = 7 × 28

x = √7 × 28

x = √196

x = 14

Hope it helps!