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Finding the Third Proportional to 18,240 and 38,388

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Solution

The third proportional to 18,240 and 38,388 is: 80,791.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,240 : 38,388 = 38,388 : x
  2. Step 2: Convert to fraction form
    18,240/38,388 = 38,388/x
  3. Step 3: Cross multiply
    18,240x = 38,388 × 38,388
  4. Step 4: Simplify right side
    18,240x = 1,473,638,544
  5. Step 5: Solve for x
    x = 1,473,638,544/18,240
  6. Step 6: Final answer
    x = 80,791.59

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.