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Finding the Fourth Proportional to 18,649.89, 27,965.21 and 5,500.55

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Solution

The fourth proportional to 18,649.89, 27,965.21 and 5,500.55 is: 8,247.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,649.89 : 27,965.21 = 5,500.55 : x
  2. Step 2: Convert to fraction form
    18,649.89/27,965.21 = 5,500.55/x
  3. Step 3: Cross multiply
    18,649.89x = 27,965.21 × 5,500.55
  4. Step 4: Simplify right side
    18,649.89x = 153,824,035.87
  5. Step 5: Solve for x
    x = 153,824,035.87/18,649.89
  6. Step 6: Final answer
    x = 8,247.99

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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.