Home / 13,680.87-20,517.65-3,818.41

Finding the Fourth Proportional to 13,680.87, 20,517.65 and 3,818.41

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Solution

The fourth proportional to 13,680.87, 20,517.65 and 3,818.41 is: 5,726.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,680.87 : 20,517.65 = 3,818.41 : x
  2. Step 2: Convert to fraction form
    13,680.87/20,517.65 = 3,818.41/x
  3. Step 3: Cross multiply
    13,680.87x = 20,517.65 × 3,818.41
  4. Step 4: Simplify right side
    13,680.87x = 78,344,780.84
  5. Step 5: Solve for x
    x = 78,344,780.84/13,680.87
  6. Step 6: Final answer
    x = 5,726.60

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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.