Finding the Fourth Proportional to 19,486,849.20, 29,217,832.20 and 8,131,815.60
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Solution
The fourth proportional to 19,486,849.20, 29,217,832.20 and 8,131,815.60 is: 12,192,531.55
Step by Step Solution
- Step 1: Write the proportion equation
19,486,849.20 : 29,217,832.20 = 8,131,815.60 : x - Step 2: Convert to fraction form
19,486,849.20/29,217,832.20 = 8,131,815.60/x - Step 3: Cross multiply
19,486,849.20x = 29,217,832.20 × 8,131,815.60 - Step 4: Simplify right side
19,486,849.20x = 237,594,023,682,142.31 - Step 5: Solve for x
x = 237,594,023,682,142.31/19,486,849.20 - Step 6: Final answer
x = 12,192,531.55
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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.