Home / 20,993.28-31,489.40-8,509.97

Finding the Fourth Proportional to 20,993.28, 31,489.40 and 8,509.97

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Solution

The fourth proportional to 20,993.28, 31,489.40 and 8,509.97 is: 12,764.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,993.28 : 31,489.40 = 8,509.97 : x
  2. Step 2: Convert to fraction form
    20,993.28/31,489.40 = 8,509.97/x
  3. Step 3: Cross multiply
    20,993.28x = 31,489.40 × 8,509.97
  4. Step 4: Simplify right side
    20,993.28x = 267,973,649.32
  5. Step 5: Solve for x
    x = 267,973,649.32/20,993.28
  6. Step 6: Final answer
    x = 12,764.73

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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.