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Finding the Fourth Proportional to 18,399.68, 27,581.06 and 8,545.87

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Solution

The fourth proportional to 18,399.68, 27,581.06 and 8,545.87 is: 12,810.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,399.68 : 27,581.06 = 8,545.87 : x
  2. Step 2: Convert to fraction form
    18,399.68/27,581.06 = 8,545.87/x
  3. Step 3: Cross multiply
    18,399.68x = 27,581.06 × 8,545.87
  4. Step 4: Simplify right side
    18,399.68x = 235,704,262.60
  5. Step 5: Solve for x
    x = 235,704,262.60/18,399.68
  6. Step 6: Final answer
    x = 12,810.24

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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.