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Finding the Third Proportional to 3,968 and 9,189

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Solution

The third proportional to 3,968 and 9,189 is: 21,279.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,968 : 9,189 = 9,189 : x
  2. Step 2: Convert to fraction form
    3,968/9,189 = 9,189/x
  3. Step 3: Cross multiply
    3,968x = 9,189 × 9,189
  4. Step 4: Simplify right side
    3,968x = 84,437,721
  5. Step 5: Solve for x
    x = 84,437,721/3,968
  6. Step 6: Final answer
    x = 21,279.67

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Why These Related Problems?

These problems maintain the same ratio (2.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.