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Finding the Fourth Proportional to 8,472.72, 12,703.95 and 3,791.85

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Solution

The fourth proportional to 8,472.72, 12,703.95 and 3,791.85 is: 5,685.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,472.72 : 12,703.95 = 3,791.85 : x
  2. Step 2: Convert to fraction form
    8,472.72/12,703.95 = 3,791.85/x
  3. Step 3: Cross multiply
    8,472.72x = 12,703.95 × 3,791.85
  4. Step 4: Simplify right side
    8,472.72x = 48,171,472.81
  5. Step 5: Solve for x
    x = 48,171,472.81/8,472.72
  6. Step 6: Final answer
    x = 5,685.48

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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.