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Finding the Third Proportional to 19,647 and 21,267

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Solution

The third proportional to 19,647 and 21,267 is: 23,020.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,647 : 21,267 = 21,267 : x
  2. Step 2: Convert to fraction form
    19,647/21,267 = 21,267/x
  3. Step 3: Cross multiply
    19,647x = 21,267 × 21,267
  4. Step 4: Simplify right side
    19,647x = 452,285,289
  5. Step 5: Solve for x
    x = 452,285,289/19,647
  6. Step 6: Final answer
    x = 23,020.58

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Why These Related Problems?

These problems maintain the same ratio (1.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.