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Finding the Fourth Proportional to 8,687.14, 13,031.31 and 3,493

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Solution

The fourth proportional to 8,687.14, 13,031.31 and 3,493 is: 5,239.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,687.14 : 13,031.31 = 3,493 : x
  2. Step 2: Convert to fraction form
    8,687.14/13,031.31 = 3,493/x
  3. Step 3: Cross multiply
    8,687.14x = 13,031.31 × 3,493
  4. Step 4: Simplify right side
    8,687.14x = 45,518,365.83
  5. Step 5: Solve for x
    x = 45,518,365.83/8,687.14
  6. Step 6: Final answer
    x = 5,239.74

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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.