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Finding the Third Proportional to 9,309 and 13,781

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Solution

The third proportional to 9,309 and 13,781 is: 20,401.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,309 : 13,781 = 13,781 : x
  2. Step 2: Convert to fraction form
    9,309/13,781 = 13,781/x
  3. Step 3: Cross multiply
    9,309x = 13,781 × 13,781
  4. Step 4: Simplify right side
    9,309x = 189,915,961
  5. Step 5: Solve for x
    x = 189,915,961/9,309
  6. Step 6: Final answer
    x = 20,401.33

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.