Home / 20,974.72-31,453.88-7,819.92

Finding the Fourth Proportional to 20,974.72, 31,453.88 and 7,819.92

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Solution

The fourth proportional to 20,974.72, 31,453.88 and 7,819.92 is: 11,726.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,974.72 : 31,453.88 = 7,819.92 : x
  2. Step 2: Convert to fraction form
    20,974.72/31,453.88 = 7,819.92/x
  3. Step 3: Cross multiply
    20,974.72x = 31,453.88 × 7,819.92
  4. Step 4: Simplify right side
    20,974.72x = 245,966,825.29
  5. Step 5: Solve for x
    x = 245,966,825.29/20,974.72
  6. Step 6: Final answer
    x = 11,726.82

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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.