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Finding the Fourth Proportional to 18,687,581.40, 28,026,123.30 and 5,912,002.20

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Solution

The fourth proportional to 18,687,581.40, 28,026,123.30 and 5,912,002.20 is: 8,866,342.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,687,581.40 : 28,026,123.30 = 5,912,002.20 : x
  2. Step 2: Convert to fraction form
    18,687,581.40/28,026,123.30 = 5,912,002.20/x
  3. Step 3: Cross multiply
    18,687,581.40x = 28,026,123.30 × 5,912,002.20
  4. Step 4: Simplify right side
    18,687,581.40x = 165,690,502,607,071.28
  5. Step 5: Solve for x
    x = 165,690,502,607,071.28/18,687,581.40
  6. Step 6: Final answer
    x = 8,866,342.79

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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.