When x is added to each of 8, 14, 20, and 30, then the numbers, so obtained, in this order form a proportion. What is the mean proportional between (x – 2) and (7x + 2)?

When x is added to each of 8, 14, 20, and 30, then the numbers, so obt

1.	When x is added to each of 8, 14, 20, and 30, then the numbers, so obtained, in this order form a proportion. What is the mean proportional between (x – 2) and (7x + 2)?
A.	25
B.	16
C.	24
D.	12
Answer» D. 12