The proportion 36:84 :: 42:X means:
8436=X42
Cross multiplying:
36×X=84×42
36X=3528
X=363528
X=98
Alternatively, simplify the first ratio:
8436=73
Since the ratios are equal:
73=X42
3X=7×42
3X=294
X=98
Therefore, the value of X is 98.
If 36: 84 :: 42: X, then the value of X, is:
Held on 13 May 2025 · Verified 13 Jul 2026.
18
98
72
48
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