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Finding the Third Proportional to 12,831 and 19,161

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Solution

The third proportional to 12,831 and 19,161 is: 28,613.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,831 : 19,161 = 19,161 : x
  2. Step 2: Convert to fraction form
    12,831/19,161 = 19,161/x
  3. Step 3: Cross multiply
    12,831x = 19,161 × 19,161
  4. Step 4: Simplify right side
    12,831x = 367,143,921
  5. Step 5: Solve for x
    x = 367,143,921/12,831
  6. Step 6: Final answer
    x = 28,613.82

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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.