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Finding the Fourth Proportional to 8,819.60, 13,207.80 and 4,197.20

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Solution

The fourth proportional to 8,819.60, 13,207.80 and 4,197.20 is: 6,285.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,819.60 : 13,207.80 = 4,197.20 : x
  2. Step 2: Convert to fraction form
    8,819.60/13,207.80 = 4,197.20/x
  3. Step 3: Cross multiply
    8,819.60x = 13,207.80 × 4,197.20
  4. Step 4: Simplify right side
    8,819.60x = 55,435,778.16
  5. Step 5: Solve for x
    x = 55,435,778.16/8,819.60
  6. Step 6: Final answer
    x = 6,285.52

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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.