Home / 20,789.81-28,691.17-11,837.69

Finding the Fourth Proportional to 20,789.81, 28,691.17 and 11,837.69

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Solution

The fourth proportional to 20,789.81, 28,691.17 and 11,837.69 is: 16,336.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789.81 : 28,691.17 = 11,837.69 : x
  2. Step 2: Convert to fraction form
    20,789.81/28,691.17 = 11,837.69/x
  3. Step 3: Cross multiply
    20,789.81x = 28,691.17 × 11,837.69
  4. Step 4: Simplify right side
    20,789.81x = 339,637,218.33
  5. Step 5: Solve for x
    x = 339,637,218.33/20,789.81
  6. Step 6: Final answer
    x = 16,336.71

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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.