Home / 20,361.29-30,542.33-13,385.79

Finding the Fourth Proportional to 20,361.29, 30,542.33 and 13,385.79

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Solution

The fourth proportional to 20,361.29, 30,542.33 and 13,385.79 is: 20,078.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,361.29 : 30,542.33 = 13,385.79 : x
  2. Step 2: Convert to fraction form
    20,361.29/30,542.33 = 13,385.79/x
  3. Step 3: Cross multiply
    20,361.29x = 30,542.33 × 13,385.79
  4. Step 4: Simplify right side
    20,361.29x = 408,833,248.96
  5. Step 5: Solve for x
    x = 408,833,248.96/20,361.29
  6. Step 6: Final answer
    x = 20,078.95

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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.