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Finding the Third Proportional to 11,198.25 and 18,438.75

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Solution

The third proportional to 11,198.25 and 18,438.75 is: 30,360.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,198.25 : 18,438.75 = 18,438.75 : x
  2. Step 2: Convert to fraction form
    11,198.25/18,438.75 = 18,438.75/x
  3. Step 3: Cross multiply
    11,198.25x = 18,438.75 × 18,438.75
  4. Step 4: Simplify right side
    11,198.25x = 339,987,501.56
  5. Step 5: Solve for x
    x = 339,987,501.56/11,198.25
  6. Step 6: Final answer
    x = 30,360.77

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Why These Related Problems?

These problems maintain the same ratio (1.65) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.