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Finding the Third Proportional to 8,821 and 11,760

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Solution

The third proportional to 8,821 and 11,760 is: 15,678.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,821 : 11,760 = 11,760 : x
  2. Step 2: Convert to fraction form
    8,821/11,760 = 11,760/x
  3. Step 3: Cross multiply
    8,821x = 11,760 × 11,760
  4. Step 4: Simplify right side
    8,821x = 138,297,600
  5. Step 5: Solve for x
    x = 138,297,600/8,821
  6. Step 6: Final answer
    x = 15,678.22

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.