Finding the Fourth Proportional to 20,511,535.68, 28,314,634.87 and 12,780,397.73
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Solution
The fourth proportional to 20,511,535.68, 28,314,634.87 and 12,780,397.73 is: 17,642,379.43
Step by Step Solution
- Step 1: Write the proportion equation
20,511,535.68 : 28,314,634.87 = 12,780,397.73 : x - Step 2: Convert to fraction form
20,511,535.68/28,314,634.87 = 12,780,397.73/x - Step 3: Cross multiply
20,511,535.68x = 28,314,634.87 × 12,780,397.73 - Step 4: Simplify right side
20,511,535.68x = 361,872,295,257,162.44 - Step 5: Solve for x
x = 361,872,295,257,162.44/20,511,535.68 - Step 6: Final answer
x = 17,642,379.43
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.