Transcript Lesson 4-4 - Elgin Local Schools

Lesson 4-4
Solving Proportions
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Definitions
• Proportion- An equation that indicates
that two ratios are equivalent.
• Cross Products-
6 3

8 4
83 = 24
64= 24
• Property of Proportions- The cross
products ofa proportion are equal.
Determine whether the ratios form a proportion.
9 18
1. ,
12 27
30 12
2. ,
35 14
Solve each proportion.
x 7
1. 
4 20
7 2
2. 
d 3
7 n
3. 
3 2 .1
A recipe serves 10 people and calls for
3 cups of flour. If you want to make the
recipe for 15 people, how many cups of
flour should you use?