Write and Solve Proportions
Solve using cross products 10 ounces for $3.50; 16 ounces for $X
$5.60
r/10 = 6/120
0.5
Find the value of the variable in the proportion b/12 = 2/24
1
Find the value of the variable in the proportion 2/3 = x/15
10
Solve using cross products 96 miles in 1 1/2 hours; p miles in 2 hours
128
Solve using cross products 7 miles in 4 hours; x miles in 8 hours
14
Find the value of the variable in the proportion 0.33/15 = w/100
2.2
Find the value of the variable in the proportion 5/3 = 45/x
27
Find the value of the variable in the proportion 12/d = 60/15
3
Find the value of the variable in the proportion 150/m = 125/5
6
Find the value of the variable in the proportion 13/39 = t/21
7
Find the value of the variable in the proportion 32/r = 96/24
8
Solve using cross products 216 cubic feet in h yards; 324 cubic feet in 12 yards
8
Solve using cross products 22 minutes to read 16 pages; t minutes to read 64 pages
88
Cross Products
Used when finding if ratios are proportional
When a number in a proportion is missing
you use equivalent ratios or cross products to find the missing number
Proportion
An equation stating that two ratios are equal