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Finding the Third Proportional to 20,388.75 and 28,712.25

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Solution

The third proportional to 20,388.75 and 28,712.25 is: 40,433.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,388.75 : 28,712.25 = 28,712.25 : x
  2. Step 2: Convert to fraction form
    20,388.75/28,712.25 = 28,712.25/x
  3. Step 3: Cross multiply
    20,388.75x = 28,712.25 × 28,712.25
  4. Step 4: Simplify right side
    20,388.75x = 824,393,300.06
  5. Step 5: Solve for x
    x = 824,393,300.06/20,388.75
  6. Step 6: Final answer
    x = 40,433.73

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.