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Finding the Fourth Proportional to 10,665.60, 16,003.20 and 4,819.20

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Solution

The fourth proportional to 10,665.60, 16,003.20 and 4,819.20 is: 7,230.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,665.60 : 16,003.20 = 4,819.20 : x
  2. Step 2: Convert to fraction form
    10,665.60/16,003.20 = 4,819.20/x
  3. Step 3: Cross multiply
    10,665.60x = 16,003.20 × 4,819.20
  4. Step 4: Simplify right side
    10,665.60x = 77,122,621.44
  5. Step 5: Solve for x
    x = 77,122,621.44/10,665.60
  6. Step 6: Final answer
    x = 7,230.97

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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.