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Finding the Third Proportional to 18,672 and 39,936

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Solution

The third proportional to 18,672 and 39,936 is: 85,415.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,672 : 39,936 = 39,936 : x
  2. Step 2: Convert to fraction form
    18,672/39,936 = 39,936/x
  3. Step 3: Cross multiply
    18,672x = 39,936 × 39,936
  4. Step 4: Simplify right side
    18,672x = 1,594,884,096
  5. Step 5: Solve for x
    x = 1,594,884,096/18,672
  6. Step 6: Final answer
    x = 85,415.81

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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.