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Finding the Third Proportional to 18,431 and 27,779

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Solution

The third proportional to 18,431 and 27,779 is: 41,868.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,431 : 27,779 = 27,779 : x
  2. Step 2: Convert to fraction form
    18,431/27,779 = 27,779/x
  3. Step 3: Cross multiply
    18,431x = 27,779 × 27,779
  4. Step 4: Simplify right side
    18,431x = 771,672,841
  5. Step 5: Solve for x
    x = 771,672,841/18,431
  6. Step 6: Final answer
    x = 41,868.20

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.