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Finding the Fourth Proportional to 8,404.40, 12,592.20 and 5,481.20

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Solution

The fourth proportional to 8,404.40, 12,592.20 and 5,481.20 is: 8,212.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,404.40 : 12,592.20 = 5,481.20 : x
  2. Step 2: Convert to fraction form
    8,404.40/12,592.20 = 5,481.20/x
  3. Step 3: Cross multiply
    8,404.40x = 12,592.20 × 5,481.20
  4. Step 4: Simplify right side
    8,404.40x = 69,020,366.64
  5. Step 5: Solve for x
    x = 69,020,366.64/8,404.40
  6. Step 6: Final answer
    x = 8,212.41

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1.5x scale

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.