Solving Proportions Proportions A proportion is an equation
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Solving Proportions
Proportions A proportion is an equation that states that two ratios are equivalent. Example: 2 3 5 9 = = 12 18 15 27
If one of the numbers in a proportion is unknown, mental math can be used to find an equivalent ratio. Example: 2 3 = = = 6 x x 3 2 3 x 3 6 x 6 9 Hint: To find the value of x, multiply 3 by 3 also.
If one of the numbers in a proportion is unknown, mental math can be used to find an equivalent ratio. Example : 28 32 = ÷ = = 7 x 4 28 32 ÷ 4 7 x 7 8 Hint: To find the value of x, divide 32 by 4 also.
Solve the proportion using equivalent ratios?
Solve the proportion using equivalent ratios?
Solve the proportion using equivalent ratios:
Solve the proportion using equivalent ratios:
Solve the proportion using equivalent ratios:
In a proportion, the cross products are equal. 5 2 = = = 30 12 5 12 2 30 60 60
Proportions can also be solved using cross products. 4 5 = 12 x Cross multiply 4 x = 5 12 4 x = 60 Solve for x x = 15 7 8 = x 48 Cross multiply 7 48 = 8 x 336 = 8 x 42 = x Solve for x
Use cross products to solve the proportion:
Use cross products to solve the proportion:
Use cross products to solve the proportion:
Use cross products to solve the proportion:
Use cross products to solve the proportion: