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Finding the Fourth Proportional to 39,163.65, 54,046.11 and 21,258.66

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Solution

The fourth proportional to 39,163.65, 54,046.11 and 21,258.66 is: 29,337.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,163.65 : 54,046.11 = 21,258.66 : x
  2. Step 2: Convert to fraction form
    39,163.65/54,046.11 = 21,258.66/x
  3. Step 3: Cross multiply
    39,163.65x = 54,046.11 × 21,258.66
  4. Step 4: Simplify right side
    39,163.65x = 1,148,947,876.81
  5. Step 5: Solve for x
    x = 1,148,947,876.81/39,163.65
  6. Step 6: Final answer
    x = 29,337.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.