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Finding the Third Proportional to 18,928 and 20,512

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Solution

The third proportional to 18,928 and 20,512 is: 22,228.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,928 : 20,512 = 20,512 : x
  2. Step 2: Convert to fraction form
    18,928/20,512 = 20,512/x
  3. Step 3: Cross multiply
    18,928x = 20,512 × 20,512
  4. Step 4: Simplify right side
    18,928x = 420,742,144
  5. Step 5: Solve for x
    x = 420,742,144/18,928
  6. Step 6: Final answer
    x = 22,228.56

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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.