Home / 18,031.88-27,046.12-12,789.36

Finding the Fourth Proportional to 18,031.88, 27,046.12 and 12,789.36

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Solution

The fourth proportional to 18,031.88, 27,046.12 and 12,789.36 is: 19,182.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,031.88 : 27,046.12 = 12,789.36 : x
  2. Step 2: Convert to fraction form
    18,031.88/27,046.12 = 12,789.36/x
  3. Step 3: Cross multiply
    18,031.88x = 27,046.12 × 12,789.36
  4. Step 4: Simplify right side
    18,031.88x = 345,902,565.28
  5. Step 5: Solve for x
    x = 345,902,565.28/18,031.88
  6. Step 6: Final answer
    x = 19,182.83

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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.