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Finding the Fourth Proportional to 18,556.60, 27,839.22 and 5,408.68

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Solution

The fourth proportional to 18,556.60, 27,839.22 and 5,408.68 is: 8,114.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,556.60 : 27,839.22 = 5,408.68 : x
  2. Step 2: Convert to fraction form
    18,556.60/27,839.22 = 5,408.68/x
  3. Step 3: Cross multiply
    18,556.60x = 27,839.22 × 5,408.68
  4. Step 4: Simplify right side
    18,556.60x = 150,573,432.43
  5. Step 5: Solve for x
    x = 150,573,432.43/18,556.60
  6. Step 6: Final answer
    x = 8,114.28

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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.