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Finding the Third Proportional to 8,120 and 11,760

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Solution

The third proportional to 8,120 and 11,760 is: 17,031.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,120 : 11,760 = 11,760 : x
  2. Step 2: Convert to fraction form
    8,120/11,760 = 11,760/x
  3. Step 3: Cross multiply
    8,120x = 11,760 × 11,760
  4. Step 4: Simplify right side
    8,120x = 138,297,600
  5. Step 5: Solve for x
    x = 138,297,600/8,120
  6. Step 6: Final answer
    x = 17,031.72

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.