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Finding the Third Proportional to 12,746 and 19,687

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Solution

The third proportional to 12,746 and 19,687 is: 30,407.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,746 : 19,687 = 19,687 : x
  2. Step 2: Convert to fraction form
    12,746/19,687 = 19,687/x
  3. Step 3: Cross multiply
    12,746x = 19,687 × 19,687
  4. Step 4: Simplify right side
    12,746x = 387,577,969
  5. Step 5: Solve for x
    x = 387,577,969/12,746
  6. Step 6: Final answer
    x = 30,407.81

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.