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Finding the Fourth Proportional to 18,905.87, 28,363.03 and 5,759.27

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Solution

The fourth proportional to 18,905.87, 28,363.03 and 5,759.27 is: 8,640.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,905.87 : 28,363.03 = 5,759.27 : x
  2. Step 2: Convert to fraction form
    18,905.87/28,363.03 = 5,759.27/x
  3. Step 3: Cross multiply
    18,905.87x = 28,363.03 × 5,759.27
  4. Step 4: Simplify right side
    18,905.87x = 163,350,404.30
  5. Step 5: Solve for x
    x = 163,350,404.30/18,905.87
  6. Step 6: Final answer
    x = 8,640.20

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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.