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Finding the Third Proportional to 18,191 and 39,181

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Solution

The third proportional to 18,191 and 39,181 is: 84,390.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,191 : 39,181 = 39,181 : x
  2. Step 2: Convert to fraction form
    18,191/39,181 = 39,181/x
  3. Step 3: Cross multiply
    18,191x = 39,181 × 39,181
  4. Step 4: Simplify right side
    18,191x = 1,535,150,761
  5. Step 5: Solve for x
    x = 1,535,150,761/18,191
  6. Step 6: Final answer
    x = 84,390.67

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.