5 / 8:3 / 4 = 9: x I have an urgent need,
Product of internal terms = product of external terms
So:
3 / 4 × 9 = 5x / 8
5 out of 8 = 27 out of 4
X = 27 / 4 ÷ 5 / 8
X = 54 / 5
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