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Finding the Third Proportional to 12,790 and 18,132

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Solution

The third proportional to 12,790 and 18,132 is: 25,705.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,790 : 18,132 = 18,132 : x
  2. Step 2: Convert to fraction form
    12,790/18,132 = 18,132/x
  3. Step 3: Cross multiply
    12,790x = 18,132 × 18,132
  4. Step 4: Simplify right side
    12,790x = 328,769,424
  5. Step 5: Solve for x
    x = 328,769,424/12,790
  6. Step 6: Final answer
    x = 25,705.19

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.