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Finding the Third Proportional to 21,225 and 28,723.13

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Solution

The third proportional to 21,225 and 28,723.13 is: 38,870.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,225 : 28,723.13 = 28,723.13 : x
  2. Step 2: Convert to fraction form
    21,225/28,723.13 = 28,723.13/x
  3. Step 3: Cross multiply
    21,225x = 28,723.13 × 28,723.13
  4. Step 4: Simplify right side
    21,225x = 825,017,909.77
  5. Step 5: Solve for x
    x = 825,017,909.77/21,225
  6. Step 6: Final answer
    x = 38,870.10

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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.