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Finding the Fourth Proportional to 39,174.96, 58,766.12 and 12,879.76

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Solution

The fourth proportional to 39,174.96, 58,766.12 and 12,879.76 is: 19,320.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,174.96 : 58,766.12 = 12,879.76 : x
  2. Step 2: Convert to fraction form
    39,174.96/58,766.12 = 12,879.76/x
  3. Step 3: Cross multiply
    39,174.96x = 58,766.12 × 12,879.76
  4. Step 4: Simplify right side
    39,174.96x = 756,893,521.73
  5. Step 5: Solve for x
    x = 756,893,521.73/39,174.96
  6. Step 6: Final answer
    x = 19,320.85

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1.5x scale

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.