If 7 : x = 17.5 : 22.5, find the value of x.
A9 ✓ Correct
B12
C15
D8
Correct answer: (A) 9
Explanation
The value of x is 9.
7 : x = 17.5 : 22.5 means 7 / x = 17.5 / 22.5.
Cross-multiply: x * 17.5 = 7 * 22.5.
x = 7 * 22.5 / 17.5 = 157.5 / 17.5.
x = 9.
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