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Finding the Fourth Proportional to 8,658.34, 12,989.12 and 2,814.18

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Solution

The fourth proportional to 8,658.34, 12,989.12 and 2,814.18 is: 4,221.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,658.34 : 12,989.12 = 2,814.18 : x
  2. Step 2: Convert to fraction form
    8,658.34/12,989.12 = 2,814.18/x
  3. Step 3: Cross multiply
    8,658.34x = 12,989.12 × 2,814.18
  4. Step 4: Simplify right side
    8,658.34x = 36,553,721.72
  5. Step 5: Solve for x
    x = 36,553,721.72/8,658.34
  6. Step 6: Final answer
    x = 4,221.79

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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.