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Finding the Third Proportional to 18,816 and 40,992

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Solution

The third proportional to 18,816 and 40,992 is: 89,304

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,816 : 40,992 = 40,992 : x
  2. Step 2: Convert to fraction form
    18,816/40,992 = 40,992/x
  3. Step 3: Cross multiply
    18,816x = 40,992 × 40,992
  4. Step 4: Simplify right side
    18,816x = 1,680,344,064
  5. Step 5: Solve for x
    x = 1,680,344,064/18,816
  6. Step 6: Final answer
    x = 89,304

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.