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Finding the Third Proportional to 12,680 and 19,388

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Solution

The third proportional to 12,680 and 19,388 is: 29,644.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,680 : 19,388 = 19,388 : x
  2. Step 2: Convert to fraction form
    12,680/19,388 = 19,388/x
  3. Step 3: Cross multiply
    12,680x = 19,388 × 19,388
  4. Step 4: Simplify right side
    12,680x = 375,894,544
  5. Step 5: Solve for x
    x = 375,894,544/12,680
  6. Step 6: Final answer
    x = 29,644.68

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.