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Finding the Third Proportional to 8,418 and 11,760

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Solution

The third proportional to 8,418 and 11,760 is: 16,428.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,418 : 11,760 = 11,760 : x
  2. Step 2: Convert to fraction form
    8,418/11,760 = 11,760/x
  3. Step 3: Cross multiply
    8,418x = 11,760 × 11,760
  4. Step 4: Simplify right side
    8,418x = 138,297,600
  5. Step 5: Solve for x
    x = 138,297,600/8,418
  6. Step 6: Final answer
    x = 16,428.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.