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Finding the Third Proportional to 3,981 and 8,484

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Solution

The third proportional to 3,981 and 8,484 is: 18,080.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981 : 8,484 = 8,484 : x
  2. Step 2: Convert to fraction form
    3,981/8,484 = 8,484/x
  3. Step 3: Cross multiply
    3,981x = 8,484 × 8,484
  4. Step 4: Simplify right side
    3,981x = 71,978,256
  5. Step 5: Solve for x
    x = 71,978,256/3,981
  6. Step 6: Final answer
    x = 18,080.45

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.