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Finding the Fourth Proportional to 8,610.35, 12,915.77 and 2,687.42

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Solution

The fourth proportional to 8,610.35, 12,915.77 and 2,687.42 is: 4,031.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,610.35 : 12,915.77 = 2,687.42 : x
  2. Step 2: Convert to fraction form
    8,610.35/12,915.77 = 2,687.42/x
  3. Step 3: Cross multiply
    8,610.35x = 12,915.77 × 2,687.42
  4. Step 4: Simplify right side
    8,610.35x = 34,710,117.47
  5. Step 5: Solve for x
    x = 34,710,117.47/8,610.35
  6. Step 6: Final answer
    x = 4,031.21

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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.