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Finding the Fourth Proportional to 18,305, 25,253.68 and 11,939

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Solution

The fourth proportional to 18,305, 25,253.68 and 11,939 is: 16,471.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,305 : 25,253.68 = 11,939 : x
  2. Step 2: Convert to fraction form
    18,305/25,253.68 = 11,939/x
  3. Step 3: Cross multiply
    18,305x = 25,253.68 × 11,939
  4. Step 4: Simplify right side
    18,305x = 301,503,685.52
  5. Step 5: Solve for x
    x = 301,503,685.52/18,305
  6. Step 6: Final answer
    x = 16,471.11

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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.