Home / 20,350.31-28,083.92-11,399.74

Finding the Fourth Proportional to 20,350.31, 28,083.92 and 11,399.74

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Solution

The fourth proportional to 20,350.31, 28,083.92 and 11,399.74 is: 15,731.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,350.31 : 28,083.92 = 11,399.74 : x
  2. Step 2: Convert to fraction form
    20,350.31/28,083.92 = 11,399.74/x
  3. Step 3: Cross multiply
    20,350.31x = 28,083.92 × 11,399.74
  4. Step 4: Simplify right side
    20,350.31x = 320,149,258.97
  5. Step 5: Solve for x
    x = 320,149,258.97/20,350.31
  6. Step 6: Final answer
    x = 15,731.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.