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Finding the Third Proportional to 11,268 and 21,126

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Solution

The third proportional to 11,268 and 21,126 is: 39,608.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,268 : 21,126 = 21,126 : x
  2. Step 2: Convert to fraction form
    11,268/21,126 = 21,126/x
  3. Step 3: Cross multiply
    11,268x = 21,126 × 21,126
  4. Step 4: Simplify right side
    11,268x = 446,307,876
  5. Step 5: Solve for x
    x = 446,307,876/11,268
  6. Step 6: Final answer
    x = 39,608.44

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Why These Related Problems?

These problems maintain the same ratio (1.87) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.