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Finding the Third Proportional to 18,712.25 and 40,018

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Solution

The third proportional to 18,712.25 and 40,018 is: 85,582.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,712.25 : 40,018 = 40,018 : x
  2. Step 2: Convert to fraction form
    18,712.25/40,018 = 40,018/x
  3. Step 3: Cross multiply
    18,712.25x = 40,018 × 40,018
  4. Step 4: Simplify right side
    18,712.25x = 1,601,440,324
  5. Step 5: Solve for x
    x = 1,601,440,324/18,712.25
  6. Step 6: Final answer
    x = 85,582.46

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.