Answer:
a. 6
b. 6
Explanation:
A. mean proportion
3:x::x:12
product of mean = product of extreme
3 x 12 = x^2
x^2= 36
now take square root on both sides
x = 6
as sqaure root will cancel the square on x and square root of 36 is 6.
B. the geometric mean is the product of all
the numbers in a set, with the root of how many numbers there are. here, there are two numbers, so a square root is used. the value of the geometric mean of 3 and 12 is 6.
Hope's it helps...