Mathematics · Ratio and Proportion
If a ∶ b ∶ c = 4 ∶ 7 ∶ 9 and b ∶ c ∶ d = 28 ∶ 36 ∶ 21, then what is the ratio a ∶ b ∶ c ∶ d?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 112 ∶ 21 ∶ 27 ∶ 17
- 216 ∶ 28 ∶ 36 ∶ 21✓
- 38 ∶ 14 ∶ 18 ∶ 21
- 44 ∶ 7 ∶ 9 ∶ 11
Correct answer
16 ∶ 28 ∶ 36 ∶ 21
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