SOLUTION: Let a, b, c and d be positive. Prove the following properties of the proportion a/b=c/d. ( Hint: For exercises 13-16, multiply both sides of a/b=c/d by an expression that will prod

Question 190034This question is from textbook algebra and trigonometry structure and method book 2
: Let a, b, c and d be positive. Prove the following properties of the proportion a/b=c/d. ( Hint: For exercises 13-16, multiply both sides of a/b=c/d by an expression that will produce the given equation.)
d/b=c/a
please explain and thank you so much. This question is from textbook algebra and trigonometry structure and method book 2

Found 2 solutions by stanbon, jim_thompson5910:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Let a, b, c and d be positive. Prove the following properties of the proportion a/b=c/d. ( Hint: For exercises 13-16, multiply both sides of a/b=c/d by an expression that will produce the given equation.)
d/b=c/a
---------------------
a/b = c/d
Multiply both sides by (d/a), as follows:
---
(d/a)(a/b) = (c/d)(d/a)
---
Cancel any factor common to a numerator and a denominator to get:
d/b = c/a
================
Cheers,
Stan H.
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
So you're trying to get from ???

Start with the given equation

Multiply both sides by "d"

Simplify

Divide both sides by "a"

Simplify
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