Home / 20,747.24-31,125.72-11,984.68

Finding the Fourth Proportional to 20,747.24, 31,125.72 and 11,984.68

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Solution

The fourth proportional to 20,747.24, 31,125.72 and 11,984.68 is: 17,979.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,747.24 : 31,125.72 = 11,984.68 : x
  2. Step 2: Convert to fraction form
    20,747.24/31,125.72 = 11,984.68/x
  3. Step 3: Cross multiply
    20,747.24x = 31,125.72 × 11,984.68
  4. Step 4: Simplify right side
    20,747.24x = 373,031,793.97
  5. Step 5: Solve for x
    x = 373,031,793.97/20,747.24
  6. Step 6: Final answer
    x = 17,979.83

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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.