Home / 20,764.70-31,049.85-15,515.90

Finding the Fourth Proportional to 20,764.70, 31,049.85 and 15,515.90

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Solution

The fourth proportional to 20,764.70, 31,049.85 and 15,515.90 is: 23,201.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,764.70 : 31,049.85 = 15,515.90 : x
  2. Step 2: Convert to fraction form
    20,764.70/31,049.85 = 15,515.90/x
  3. Step 3: Cross multiply
    20,764.70x = 31,049.85 × 15,515.90
  4. Step 4: Simplify right side
    20,764.70x = 481,766,367.62
  5. Step 5: Solve for x
    x = 481,766,367.62/20,764.70
  6. Step 6: Final answer
    x = 23,201.22

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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.