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Finding the Fourth Proportional to 40,519.89, 60,789.54 and 12,817.89

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Solution

The fourth proportional to 40,519.89, 60,789.54 and 12,817.89 is: 19,229.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,519.89 : 60,789.54 = 12,817.89 : x
  2. Step 2: Convert to fraction form
    40,519.89/60,789.54 = 12,817.89/x
  3. Step 3: Cross multiply
    40,519.89x = 60,789.54 × 12,817.89
  4. Step 4: Simplify right side
    40,519.89x = 779,193,636.87
  5. Step 5: Solve for x
    x = 779,193,636.87/40,519.89
  6. Step 6: Final answer
    x = 19,229.91

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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.