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Finding the Third Proportional to 8,220 and 10,080

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Solution

The third proportional to 8,220 and 10,080 is: 12,360.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,220 : 10,080 = 10,080 : x
  2. Step 2: Convert to fraction form
    8,220/10,080 = 10,080/x
  3. Step 3: Cross multiply
    8,220x = 10,080 × 10,080
  4. Step 4: Simplify right side
    8,220x = 101,606,400
  5. Step 5: Solve for x
    x = 101,606,400/8,220
  6. Step 6: Final answer
    x = 12,360.88

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Why These Related Problems?

These problems maintain the same ratio (1.23) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.