Finding the Fourth Proportional to 28,982,139.40, 43,423,442.70 and 18,879,560.20
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Solution
The fourth proportional to 28,982,139.40, 43,423,442.70 and 18,879,560.20 is: 28,286,921.45
Step by Step Solution
- Step 1: Write the proportion equation
28,982,139.40 : 43,423,442.70 = 18,879,560.20 : x - Step 2: Convert to fraction form
28,982,139.40/43,423,442.70 = 18,879,560.20/x - Step 3: Cross multiply
28,982,139.40x = 43,423,442.70 × 18,879,560.20 - Step 4: Simplify right side
28,982,139.40x = 819,815,500,545,900.62 - Step 5: Solve for x
x = 819,815,500,545,900.62/28,982,139.40 - Step 6: Final answer
x = 28,286,921.45
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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.