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Finding the Fourth Proportional to 13,385.40, 20,063.70 and 5,062.20

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Solution

The fourth proportional to 13,385.40, 20,063.70 and 5,062.20 is: 7,587.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,385.40 : 20,063.70 = 5,062.20 : x
  2. Step 2: Convert to fraction form
    13,385.40/20,063.70 = 5,062.20/x
  3. Step 3: Cross multiply
    13,385.40x = 20,063.70 × 5,062.20
  4. Step 4: Simplify right side
    13,385.40x = 101,566,462.14
  5. Step 5: Solve for x
    x = 101,566,462.14/13,385.40
  6. Step 6: Final answer
    x = 7,587.85

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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.