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Finding the Third Proportional to 11,921.25 and 18,872.75

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Solution

The third proportional to 11,921.25 and 18,872.75 is: 29,877.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,921.25 : 18,872.75 = 18,872.75 : x
  2. Step 2: Convert to fraction form
    11,921.25/18,872.75 = 18,872.75/x
  3. Step 3: Cross multiply
    11,921.25x = 18,872.75 × 18,872.75
  4. Step 4: Simplify right side
    11,921.25x = 356,180,692.56
  5. Step 5: Solve for x
    x = 356,180,692.56/11,921.25
  6. Step 6: Final answer
    x = 29,877.80

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.