Home / 20,386,068.40-28,132,778.40-11,218,711.20

Finding the Fourth Proportional to 20,386,068.40, 28,132,778.40 and 11,218,711.20

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Solution

The fourth proportional to 20,386,068.40, 28,132,778.40 and 11,218,711.20 is: 15,481,823.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,386,068.40 : 28,132,778.40 = 11,218,711.20 : x
  2. Step 2: Convert to fraction form
    20,386,068.40/28,132,778.40 = 11,218,711.20/x
  3. Step 3: Cross multiply
    20,386,068.40x = 28,132,778.40 × 11,218,711.20
  4. Step 4: Simplify right side
    20,386,068.40x = 315,613,516,123,198.06
  5. Step 5: Solve for x
    x = 315,613,516,123,198.06/20,386,068.40
  6. Step 6: Final answer
    x = 15,481,823.66

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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.