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Finding the Fourth Proportional to 18,564.60, 27,844.20 and 5,415.60

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Solution

The fourth proportional to 18,564.60, 27,844.20 and 5,415.60 is: 8,122.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,564.60 : 27,844.20 = 5,415.60 : x
  2. Step 2: Convert to fraction form
    18,564.60/27,844.20 = 5,415.60/x
  3. Step 3: Cross multiply
    18,564.60x = 27,844.20 × 5,415.60
  4. Step 4: Simplify right side
    18,564.60x = 150,793,049.52
  5. Step 5: Solve for x
    x = 150,793,049.52/18,564.60
  6. Step 6: Final answer
    x = 8,122.61

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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.