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Finding the Fourth Proportional to 8,418, 12,631.92 and 3,801

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Solution

The fourth proportional to 8,418, 12,631.92 and 3,801 is: 5,703.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,418 : 12,631.92 = 3,801 : x
  2. Step 2: Convert to fraction form
    8,418/12,631.92 = 3,801/x
  3. Step 3: Cross multiply
    8,418x = 12,631.92 × 3,801
  4. Step 4: Simplify right side
    8,418x = 48,013,927.92
  5. Step 5: Solve for x
    x = 48,013,927.92/8,418
  6. Step 6: Final answer
    x = 5,703.72

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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.