Home / 13,425.87-20,139.18-3,565.15

Finding the Fourth Proportional to 13,425.87, 20,139.18 and 3,565.15

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Solution

The fourth proportional to 13,425.87, 20,139.18 and 3,565.15 is: 5,347.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,425.87 : 20,139.18 = 3,565.15 : x
  2. Step 2: Convert to fraction form
    13,425.87/20,139.18 = 3,565.15/x
  3. Step 3: Cross multiply
    13,425.87x = 20,139.18 × 3,565.15
  4. Step 4: Simplify right side
    13,425.87x = 71,799,197.58
  5. Step 5: Solve for x
    x = 71,799,197.58/13,425.87
  6. Step 6: Final answer
    x = 5,347.82

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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.