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Finding the Third Proportional to 18,928 and 28,406

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Solution

The third proportional to 18,928 and 28,406 is: 42,630.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,928 : 28,406 = 28,406 : x
  2. Step 2: Convert to fraction form
    18,928/28,406 = 28,406/x
  3. Step 3: Cross multiply
    18,928x = 28,406 × 28,406
  4. Step 4: Simplify right side
    18,928x = 806,900,836
  5. Step 5: Solve for x
    x = 806,900,836/18,928
  6. Step 6: Final answer
    x = 42,630.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.