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Finding the Third Proportional to 13,003 and 20,939

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Solution

The third proportional to 13,003 and 20,939 is: 33,718.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,003 : 20,939 = 20,939 : x
  2. Step 2: Convert to fraction form
    13,003/20,939 = 20,939/x
  3. Step 3: Cross multiply
    13,003x = 20,939 × 20,939
  4. Step 4: Simplify right side
    13,003x = 438,441,721
  5. Step 5: Solve for x
    x = 438,441,721/13,003
  6. Step 6: Final answer
    x = 33,718.51

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.