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Finding the Third Proportional to 18,388 and 38,888

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Solution

The third proportional to 18,388 and 38,888 is: 82,242.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,388 : 38,888 = 38,888 : x
  2. Step 2: Convert to fraction form
    18,388/38,888 = 38,888/x
  3. Step 3: Cross multiply
    18,388x = 38,888 × 38,888
  4. Step 4: Simplify right side
    18,388x = 1,512,276,544
  5. Step 5: Solve for x
    x = 1,512,276,544/18,388
  6. Step 6: Final answer
    x = 82,242.58

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.