Arithmeticmedium · Past Paper
The fourth proportional to 0.12, 0.21, 8 is:
A14
B16
C12
D10
✓ Correct Answer: A — 14
0.12 / 0.21 = 8 / x => 12/21 = 8/x => 4/7 = 8/x => 4x = 56 => x = 14.
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