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Finding the Third Proportional to 13,678 and 20,697

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Solution

The third proportional to 13,678 and 20,697 is: 31,317.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,678 : 20,697 = 20,697 : x
  2. Step 2: Convert to fraction form
    13,678/20,697 = 20,697/x
  3. Step 3: Cross multiply
    13,678x = 20,697 × 20,697
  4. Step 4: Simplify right side
    13,678x = 428,365,809
  5. Step 5: Solve for x
    x = 428,365,809/13,678
  6. Step 6: Final answer
    x = 31,317.87

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.