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Finding the Third Proportional to 13,779 and 20,637

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Solution

The third proportional to 13,779 and 20,637 is: 30,908.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779 : 20,637 = 20,637 : x
  2. Step 2: Convert to fraction form
    13,779/20,637 = 20,637/x
  3. Step 3: Cross multiply
    13,779x = 20,637 × 20,637
  4. Step 4: Simplify right side
    13,779x = 425,885,769
  5. Step 5: Solve for x
    x = 425,885,769/13,779
  6. Step 6: Final answer
    x = 30,908.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.