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Finding the Fourth Proportional to 18,773.78, 25,906.03 and 11,218.60

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Solution

The fourth proportional to 18,773.78, 25,906.03 and 11,218.60 is: 15,480.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,773.78 : 25,906.03 = 11,218.60 : x
  2. Step 2: Convert to fraction form
    18,773.78/25,906.03 = 11,218.60/x
  3. Step 3: Cross multiply
    18,773.78x = 25,906.03 × 11,218.60
  4. Step 4: Simplify right side
    18,773.78x = 290,629,392.49
  5. Step 5: Solve for x
    x = 290,629,392.49/18,773.78
  6. Step 6: Final answer
    x = 15,480.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.