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Finding the Fourth Proportional to 18,877.72, 28,327.44 and 11,092

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Solution

The fourth proportional to 18,877.72, 28,327.44 and 11,092 is: 16,644.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,877.72 : 28,327.44 = 11,092 : x
  2. Step 2: Convert to fraction form
    18,877.72/28,327.44 = 11,092/x
  3. Step 3: Cross multiply
    18,877.72x = 28,327.44 × 11,092
  4. Step 4: Simplify right side
    18,877.72x = 314,207,964.48
  5. Step 5: Solve for x
    x = 314,207,964.48/18,877.72
  6. Step 6: Final answer
    x = 16,644.38

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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.