Finding the Fourth Proportional to 10,528,861.20, 15,769,672.20 and 8,639,293.20
Calculator
Solution
The fourth proportional to 10,528,861.20, 15,769,672.20 and 8,639,293.20 is: 12,939,559.10
Step by Step Solution
- Step 1: Write the proportion equation
10,528,861.20 : 15,769,672.20 = 8,639,293.20 : x - Step 2: Convert to fraction form
10,528,861.20/15,769,672.20 = 8,639,293.20/x - Step 3: Cross multiply
10,528,861.20x = 15,769,672.20 × 8,639,293.20 - Step 4: Simplify right side
10,528,861.20x = 136,238,821,803,689.02 - Step 5: Solve for x
x = 136,238,821,803,689.02/10,528,861.20 - Step 6: Final answer
x = 12,939,559.10
Related Problems
Find fourth proportional to 5,264,430.60, 7,884,836.10 and 4,319,646.60
Half scale
Find fourth proportional to 21,057,722.40, 31,539,344.40 and 17,278,586.40
Double scale
Find fourth proportional to 10,528,862.20, 15,769,673.70 and 8,639,294.20
Similar ratio
Find fourth proportional to 15,793,291.80, 23,654,508.30 and 12,958,939.80
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.