SOLUTION: In your own words, explain in detail why we can determine which of two fractions is greater by using the cross-multiplying method. What is the rationale behind this method? What a

Question 162606: In your own words, explain in detail why we can determine which of two fractions is greater by using the cross-multiplying method. What is the rationale behind this method? What are we really doing when we cross-multiply in order to compare fractions?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
In your own words, explain in detail why we can determine which of two fractions is greater by using the cross-multiplying method. What is the rationale behind this method? What are we really doing when we cross-multiply in order to compare fractions?
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Typical Proportion: a/b = c/d
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Multiply both sides by bd to get:
(bd)(a/b) = (bd)(c/d)
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Cancel where you can to get:
ad = bc (This is the cross-multiplication pattern)
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Cheers,
Stan H.
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