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Finding the Fourth Proportional to 18,710.52, 28,065.78 and 5,562.87

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Solution

The fourth proportional to 18,710.52, 28,065.78 and 5,562.87 is: 8,344.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,710.52 : 28,065.78 = 5,562.87 : x
  2. Step 2: Convert to fraction form
    18,710.52/28,065.78 = 5,562.87/x
  3. Step 3: Cross multiply
    18,710.52x = 28,065.78 × 5,562.87
  4. Step 4: Simplify right side
    18,710.52x = 156,126,285.59
  5. Step 5: Solve for x
    x = 156,126,285.59/18,710.52
  6. Step 6: Final answer
    x = 8,344.31

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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.