|
In equivalent ratios, the product of the means is equal to the product of the extremes. *means are the middle numbers *extremes are the outside numbers Solve Proportions Using Means & Extremes 3:5 = 6:10 5×6 = 3×10 In equivalent fractions, the cross products are equal. In equivalent ratios, the product of the means is equal to the product of the extremes. Ratios as fractions: 3:5 = 6:10 5×6 = 3×10 3 5 = 6 10 ***You may use a calculator for this quiz! Step 2: Divide both sides by the coefficient of the variable: Step 1: Cross multiply Finding a missing value using means and extremes (cross products). 3×6 = 4×n 3 4 4.5 = n 18 = 4n ÷4 = ÷4 n 6 Write the cross products in an equation. 4 9 Solve the equation. n = n = = 6 n Write the cross products in an equation. n 8 Solve the equation. n = n = = 3 5 Write the cross products in an equation. 12 n Solve the equation. n = n = = 8 7 Write the cross products in an equation. 10 4 Solve the equation. n = n = = 18 n Write the cross products in an equation. 20 8 Solve the equation. n = n = = 15 n Write the cross products in an equation. 20 n Solve the equation. n = n = = 30 12 Write the cross products in an equation. 14 n Solve the equation. n = n = = 5 4 |