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Finding the Third Proportional to 18,936 and 40,779

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Solution

The third proportional to 18,936 and 40,779 is: 87,818.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,936 : 40,779 = 40,779 : x
  2. Step 2: Convert to fraction form
    18,936/40,779 = 40,779/x
  3. Step 3: Cross multiply
    18,936x = 40,779 × 40,779
  4. Step 4: Simplify right side
    18,936x = 1,662,926,841
  5. Step 5: Solve for x
    x = 1,662,926,841/18,936
  6. Step 6: Final answer
    x = 87,818.27

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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.