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Finding the Third Proportional to 4,788 and 11,922

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Solution

The third proportional to 4,788 and 11,922 is: 29,685.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,788 : 11,922 = 11,922 : x
  2. Step 2: Convert to fraction form
    4,788/11,922 = 11,922/x
  3. Step 3: Cross multiply
    4,788x = 11,922 × 11,922
  4. Step 4: Simplify right side
    4,788x = 142,134,084
  5. Step 5: Solve for x
    x = 142,134,084/4,788
  6. Step 6: Final answer
    x = 29,685.48

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Why These Related Problems?

These problems maintain the same ratio (2.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.