Home / 20,842.97-31,270.31-8,371.76

Finding the Fourth Proportional to 20,842.97, 31,270.31 and 8,371.76

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Solution

The fourth proportional to 20,842.97, 31,270.31 and 8,371.76 is: 12,559.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,842.97 : 31,270.31 = 8,371.76 : x
  2. Step 2: Convert to fraction form
    20,842.97/31,270.31 = 8,371.76/x
  3. Step 3: Cross multiply
    20,842.97x = 31,270.31 × 8,371.76
  4. Step 4: Simplify right side
    20,842.97x = 261,787,332.24
  5. Step 5: Solve for x
    x = 261,787,332.24/20,842.97
  6. Step 6: Final answer
    x = 12,559.99

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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.