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Finding the Fourth Proportional to 28,508.75, 42,763.13 and 8,787.32

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Solution

The fourth proportional to 28,508.75, 42,763.13 and 8,787.32 is: 13,180.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,508.75 : 42,763.13 = 8,787.32 : x
  2. Step 2: Convert to fraction form
    28,508.75/42,763.13 = 8,787.32/x
  3. Step 3: Cross multiply
    28,508.75x = 42,763.13 × 8,787.32
  4. Step 4: Simplify right side
    28,508.75x = 375,773,049.76
  5. Step 5: Solve for x
    x = 375,773,049.76/28,508.75
  6. Step 6: Final answer
    x = 13,180.97

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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.