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Finding the Third Proportional to 18,531 and 40,842

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Solution

The third proportional to 18,531 and 40,842 is: 90,015.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,531 : 40,842 = 40,842 : x
  2. Step 2: Convert to fraction form
    18,531/40,842 = 40,842/x
  3. Step 3: Cross multiply
    18,531x = 40,842 × 40,842
  4. Step 4: Simplify right side
    18,531x = 1,668,068,964
  5. Step 5: Solve for x
    x = 1,668,068,964/18,531
  6. Step 6: Final answer
    x = 90,015.05

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.