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Finding the Third Proportional to 12,658 and 19,885

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Solution

The third proportional to 12,658 and 19,885 is: 31,238.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,658 : 19,885 = 19,885 : x
  2. Step 2: Convert to fraction form
    12,658/19,885 = 19,885/x
  3. Step 3: Cross multiply
    12,658x = 19,885 × 19,885
  4. Step 4: Simplify right side
    12,658x = 395,413,225
  5. Step 5: Solve for x
    x = 395,413,225/12,658
  6. Step 6: Final answer
    x = 31,238.21

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.