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Finding the Fourth Proportional to 8,517.15, 12,787.98 and 6,179.79

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Solution

The fourth proportional to 8,517.15, 12,787.98 and 6,179.79 is: 9,278.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,517.15 : 12,787.98 = 6,179.79 : x
  2. Step 2: Convert to fraction form
    8,517.15/12,787.98 = 6,179.79/x
  3. Step 3: Cross multiply
    8,517.15x = 12,787.98 × 6,179.79
  4. Step 4: Simplify right side
    8,517.15x = 79,027,055.70
  5. Step 5: Solve for x
    x = 79,027,055.70/8,517.15
  6. Step 6: Final answer
    x = 9,278.58

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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.