Home / 13,820.80-20,731.20-3,432.55

Finding the Fourth Proportional to 13,820.80, 20,731.20 and 3,432.55

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Solution

The fourth proportional to 13,820.80, 20,731.20 and 3,432.55 is: 5,148.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,820.80 : 20,731.20 = 3,432.55 : x
  2. Step 2: Convert to fraction form
    13,820.80/20,731.20 = 3,432.55/x
  3. Step 3: Cross multiply
    13,820.80x = 20,731.20 × 3,432.55
  4. Step 4: Simplify right side
    13,820.80x = 71,160,880.56
  5. Step 5: Solve for x
    x = 71,160,880.56/13,820.80
  6. Step 6: Final answer
    x = 5,148.83

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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.