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Finding the Third Proportional to 13,212 and 19,749

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Solution

The third proportional to 13,212 and 19,749 is: 29,520.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,212 : 19,749 = 19,749 : x
  2. Step 2: Convert to fraction form
    13,212/19,749 = 19,749/x
  3. Step 3: Cross multiply
    13,212x = 19,749 × 19,749
  4. Step 4: Simplify right side
    13,212x = 390,023,001
  5. Step 5: Solve for x
    x = 390,023,001/13,212
  6. Step 6: Final answer
    x = 29,520.36

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.