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Finding the Third Proportional to 11,988 and 28,218

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Solution

The third proportional to 11,988 and 28,218 is: 66,421.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,988 : 28,218 = 28,218 : x
  2. Step 2: Convert to fraction form
    11,988/28,218 = 28,218/x
  3. Step 3: Cross multiply
    11,988x = 28,218 × 28,218
  4. Step 4: Simplify right side
    11,988x = 796,255,524
  5. Step 5: Solve for x
    x = 796,255,524/11,988
  6. Step 6: Final answer
    x = 66,421.05

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Why These Related Problems?

These problems maintain the same ratio (2.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.