Question

Find the value of x so that : 5, 15, X, X + 8 are proportional.
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Answer 1

Answer:

x= 4

Explanation:

Product of extremes = Product of Means

5 X (x+8) = 15 X x

5x + 40 = 15x

40 = 15x - 5x

40 = 10x

40÷10 = 4

Therefore, x=4