Home / 20,952.78-31,401.30-15,379.98

Finding the Fourth Proportional to 20,952.78, 31,401.30 and 15,379.98

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Solution

The fourth proportional to 20,952.78, 31,401.30 and 15,379.98 is: 23,049.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,952.78 : 31,401.30 = 15,379.98 : x
  2. Step 2: Convert to fraction form
    20,952.78/31,401.30 = 15,379.98/x
  3. Step 3: Cross multiply
    20,952.78x = 31,401.30 × 15,379.98
  4. Step 4: Simplify right side
    20,952.78x = 482,951,365.97
  5. Step 5: Solve for x
    x = 482,951,365.97/20,952.78
  6. Step 6: Final answer
    x = 23,049.51

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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.