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Finding the Third Proportional to 9,372 and 20,121

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Solution

The third proportional to 9,372 and 20,121 is: 43,198.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,372 : 20,121 = 20,121 : x
  2. Step 2: Convert to fraction form
    9,372/20,121 = 20,121/x
  3. Step 3: Cross multiply
    9,372x = 20,121 × 20,121
  4. Step 4: Simplify right side
    9,372x = 404,854,641
  5. Step 5: Solve for x
    x = 404,854,641/9,372
  6. Step 6: Final answer
    x = 43,198.32

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.