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Finding the Fourth Proportional to 18,872.70, 28,309.17 and 5,545.64

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Solution

The fourth proportional to 18,872.70, 28,309.17 and 5,545.64 is: 8,318.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,872.70 : 28,309.17 = 5,545.64 : x
  2. Step 2: Convert to fraction form
    18,872.70/28,309.17 = 5,545.64/x
  3. Step 3: Cross multiply
    18,872.70x = 28,309.17 × 5,545.64
  4. Step 4: Simplify right side
    18,872.70x = 156,992,557.09
  5. Step 5: Solve for x
    x = 156,992,557.09/18,872.70
  6. Step 6: Final answer
    x = 8,318.50

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1.5x scale

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.