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
Algebra ->
Percentage-and-ratio-word-problems
-> 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
Log On
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?
----------------------------------
Typical Proportion: a/b = c/d
----------
Multiply both sides by bd to get:
(bd)(a/b) = (bd)(c/d)
---------------------------
Cancel where you can to get:
ad = bc (This is the cross-multiplication pattern)
===============
Cheers,
Stan H.
(