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Finding the Third Proportional to 13,779 and 23,220

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Solution

The third proportional to 13,779 and 23,220 is: 39,129.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779 : 23,220 = 23,220 : x
  2. Step 2: Convert to fraction form
    13,779/23,220 = 23,220/x
  3. Step 3: Cross multiply
    13,779x = 23,220 × 23,220
  4. Step 4: Simplify right side
    13,779x = 539,168,400
  5. Step 5: Solve for x
    x = 539,168,400/13,779
  6. Step 6: Final answer
    x = 39,129.72

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Why These Related Problems?

These problems maintain the same ratio (1.69) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.