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Finding the Third Proportional to 18,826 and 20,266

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Solution

The third proportional to 18,826 and 20,266 is: 21,816.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,826 : 20,266 = 20,266 : x
  2. Step 2: Convert to fraction form
    18,826/20,266 = 20,266/x
  3. Step 3: Cross multiply
    18,826x = 20,266 × 20,266
  4. Step 4: Simplify right side
    18,826x = 410,710,756
  5. Step 5: Solve for x
    x = 410,710,756/18,826
  6. Step 6: Final answer
    x = 21,816.15

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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.