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Finding the Third Proportional to 18,668 and 40,621

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Solution

The third proportional to 18,668 and 40,621 is: 88,390.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,668 : 40,621 = 40,621 : x
  2. Step 2: Convert to fraction form
    18,668/40,621 = 40,621/x
  3. Step 3: Cross multiply
    18,668x = 40,621 × 40,621
  4. Step 4: Simplify right side
    18,668x = 1,650,065,641
  5. Step 5: Solve for x
    x = 1,650,065,641/18,668
  6. Step 6: Final answer
    x = 88,390.06

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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.