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Fill in the missing value in a proportion — 2:3 = 8:?
Common ratios
Result
D
12
(4 × 9) ÷ 3 = 12
D = (B × C) ÷ A
Enter the values and press Run —
Results will collect here.
A statement that two ratios are equal. Written A:B = C:D, it holds that the inner pair multiplied equals the outer pair multiplied (B×C = A×D) — and that's how the missing value is found.