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Finding the Fourth Proportional to 13,404.40, 20,092.20 and 5,081.20

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Solution

The fourth proportional to 13,404.40, 20,092.20 and 5,081.20 is: 7,616.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,404.40 : 20,092.20 = 5,081.20 : x
  2. Step 2: Convert to fraction form
    13,404.40/20,092.20 = 5,081.20/x
  3. Step 3: Cross multiply
    13,404.40x = 20,092.20 × 5,081.20
  4. Step 4: Simplify right side
    13,404.40x = 102,092,486.64
  5. Step 5: Solve for x
    x = 102,092,486.64/13,404.40
  6. Step 6: Final answer
    x = 7,616.34

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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.