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Finding the Fourth Proportional to 15,129.60, 22,649.60 and 11,251.20

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Solution

The fourth proportional to 15,129.60, 22,649.60 and 11,251.20 is: 16,843.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,129.60 : 22,649.60 = 11,251.20 : x
  2. Step 2: Convert to fraction form
    15,129.60/22,649.60 = 11,251.20/x
  3. Step 3: Cross multiply
    15,129.60x = 22,649.60 × 11,251.20
  4. Step 4: Simplify right side
    15,129.60x = 254,835,179.52
  5. Step 5: Solve for x
    x = 254,835,179.52/15,129.60
  6. Step 6: Final answer
    x = 16,843.48

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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.