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Finding the Third Proportional to 18,879 and 40,008

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Solution

The third proportional to 18,879 and 40,008 is: 84,784.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,879 : 40,008 = 40,008 : x
  2. Step 2: Convert to fraction form
    18,879/40,008 = 40,008/x
  3. Step 3: Cross multiply
    18,879x = 40,008 × 40,008
  4. Step 4: Simplify right side
    18,879x = 1,600,640,064
  5. Step 5: Solve for x
    x = 1,600,640,064/18,879
  6. Step 6: Final answer
    x = 84,784.16

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.