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Finding the Third Proportional to 21,225 and 28,723

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Solution

The third proportional to 21,225 and 28,723 is: 38,869.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,225 : 28,723 = 28,723 : x
  2. Step 2: Convert to fraction form
    21,225/28,723 = 28,723/x
  3. Step 3: Cross multiply
    21,225x = 28,723 × 28,723
  4. Step 4: Simplify right side
    21,225x = 825,010,729
  5. Step 5: Solve for x
    x = 825,010,729/21,225
  6. Step 6: Final answer
    x = 38,869.76

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.