Home / 13,680.12-20,523.68-3,819.42

Finding the Fourth Proportional to 13,680.12, 20,523.68 and 3,819.42

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Solution

The fourth proportional to 13,680.12, 20,523.68 and 3,819.42 is: 5,730.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,680.12 : 20,523.68 = 3,819.42 : x
  2. Step 2: Convert to fraction form
    13,680.12/20,523.68 = 3,819.42/x
  3. Step 3: Cross multiply
    13,680.12x = 20,523.68 × 3,819.42
  4. Step 4: Simplify right side
    13,680.12x = 78,388,534.77
  5. Step 5: Solve for x
    x = 78,388,534.77/13,680.12
  6. Step 6: Final answer
    x = 5,730.11

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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.