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Finding the Fourth Proportional to 8,581.88, 12,872.89 and 3,387.75

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Solution

The fourth proportional to 8,581.88, 12,872.89 and 3,387.75 is: 5,081.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,581.88 : 12,872.89 = 3,387.75 : x
  2. Step 2: Convert to fraction form
    8,581.88/12,872.89 = 3,387.75/x
  3. Step 3: Cross multiply
    8,581.88x = 12,872.89 × 3,387.75
  4. Step 4: Simplify right side
    8,581.88x = 43,610,137.33
  5. Step 5: Solve for x
    x = 43,610,137.33/8,581.88
  6. Step 6: Final answer
    x = 5,081.66

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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.