Home / 20,721.70-31,046.10-17,003.80

Finding the Fourth Proportional to 20,721.70, 31,046.10 and 17,003.80

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Solution

The fourth proportional to 20,721.70, 31,046.10 and 17,003.80 is: 25,475.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.70 : 31,046.10 = 17,003.80 : x
  2. Step 2: Convert to fraction form
    20,721.70/31,046.10 = 17,003.80/x
  3. Step 3: Cross multiply
    20,721.70x = 31,046.10 × 17,003.80
  4. Step 4: Simplify right side
    20,721.70x = 527,901,675.18
  5. Step 5: Solve for x
    x = 527,901,675.18/20,721.70
  6. Step 6: Final answer
    x = 25,475.79

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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.