Home / 38,428.80-57,643.17-12,135.78

Finding the Fourth Proportional to 38,428.80, 57,643.17 and 12,135.78

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Solution

The fourth proportional to 38,428.80, 57,643.17 and 12,135.78 is: 18,203.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,428.80 : 57,643.17 = 12,135.78 : x
  2. Step 2: Convert to fraction form
    38,428.80/57,643.17 = 12,135.78/x
  3. Step 3: Cross multiply
    38,428.80x = 57,643.17 × 12,135.78
  4. Step 4: Simplify right side
    38,428.80x = 699,544,829.62
  5. Step 5: Solve for x
    x = 699,544,829.62/38,428.80
  6. Step 6: Final answer
    x = 18,203.66

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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.