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Finding the Fourth Proportional to 18,981,003.40, 28,471,505.10 and 8,745,843.40

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Solution

The fourth proportional to 18,981,003.40, 28,471,505.10 and 8,745,843.40 is: 13,118,765.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,981,003.40 : 28,471,505.10 = 8,745,843.40 : x
  2. Step 2: Convert to fraction form
    18,981,003.40/28,471,505.10 = 8,745,843.40/x
  3. Step 3: Cross multiply
    18,981,003.40x = 28,471,505.10 × 8,745,843.40
  4. Step 4: Simplify right side
    18,981,003.40x = 249,007,324,966,901.38
  5. Step 5: Solve for x
    x = 249,007,324,966,901.38/18,981,003.40
  6. Step 6: Final answer
    x = 13,118,765.10

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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.