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Finding the Third Proportional to 8,391 and 17,779

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Solution

The third proportional to 8,391 and 17,779 is: 37,670.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,391 : 17,779 = 17,779 : x
  2. Step 2: Convert to fraction form
    8,391/17,779 = 17,779/x
  3. Step 3: Cross multiply
    8,391x = 17,779 × 17,779
  4. Step 4: Simplify right side
    8,391x = 316,092,841
  5. Step 5: Solve for x
    x = 316,092,841/8,391
  6. Step 6: Final answer
    x = 37,670.46

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.