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Finding the Fourth Proportional to 28,758.87, 43,139.87 and 8,766.85

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Solution

The fourth proportional to 28,758.87, 43,139.87 and 8,766.85 is: 13,150.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,758.87 : 43,139.87 = 8,766.85 : x
  2. Step 2: Convert to fraction form
    28,758.87/43,139.87 = 8,766.85/x
  3. Step 3: Cross multiply
    28,758.87x = 43,139.87 × 8,766.85
  4. Step 4: Simplify right side
    28,758.87x = 378,200,706.73
  5. Step 5: Solve for x
    x = 378,200,706.73/28,758.87
  6. Step 6: Final answer
    x = 13,150.75

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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.