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Finding the Third Proportional to 11,351.25 and 18,135

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Solution

The third proportional to 11,351.25 and 18,135 is: 28,972.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,351.25 : 18,135 = 18,135 : x
  2. Step 2: Convert to fraction form
    11,351.25/18,135 = 18,135/x
  3. Step 3: Cross multiply
    11,351.25x = 18,135 × 18,135
  4. Step 4: Simplify right side
    11,351.25x = 328,878,225
  5. Step 5: Solve for x
    x = 328,878,225/11,351.25
  6. Step 6: Final answer
    x = 28,972.86

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.