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Finding the Third Proportional to 4,872 and 9,928

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Solution

The third proportional to 4,872 and 9,928 is: 20,230.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,872 : 9,928 = 9,928 : x
  2. Step 2: Convert to fraction form
    4,872/9,928 = 9,928/x
  3. Step 3: Cross multiply
    4,872x = 9,928 × 9,928
  4. Step 4: Simplify right side
    4,872x = 98,565,184
  5. Step 5: Solve for x
    x = 98,565,184/4,872
  6. Step 6: Final answer
    x = 20,230.95

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Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.