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Finding the Fourth Proportional to 18,833.80, 28,251.78 and 5,687.50

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Solution

The fourth proportional to 18,833.80, 28,251.78 and 5,687.50 is: 8,531.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,833.80 : 28,251.78 = 5,687.50 : x
  2. Step 2: Convert to fraction form
    18,833.80/28,251.78 = 5,687.50/x
  3. Step 3: Cross multiply
    18,833.80x = 28,251.78 × 5,687.50
  4. Step 4: Simplify right side
    18,833.80x = 160,681,998.75
  5. Step 5: Solve for x
    x = 160,681,998.75/18,833.80
  6. Step 6: Final answer
    x = 8,531.58

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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.