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Finding the Third Proportional to 18,880 and 45,418

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Solution

The third proportional to 18,880 and 45,418 is: 109,258.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,880 : 45,418 = 45,418 : x
  2. Step 2: Convert to fraction form
    18,880/45,418 = 45,418/x
  3. Step 3: Cross multiply
    18,880x = 45,418 × 45,418
  4. Step 4: Simplify right side
    18,880x = 2,062,794,724
  5. Step 5: Solve for x
    x = 2,062,794,724/18,880
  6. Step 6: Final answer
    x = 109,258.20

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Why These Related Problems?

These problems maintain the same ratio (2.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.