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Finding the Third Proportional to 20,176 and 28,221

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Solution

The third proportional to 20,176 and 28,221 is: 39,473.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,176 : 28,221 = 28,221 : x
  2. Step 2: Convert to fraction form
    20,176/28,221 = 28,221/x
  3. Step 3: Cross multiply
    20,176x = 28,221 × 28,221
  4. Step 4: Simplify right side
    20,176x = 796,424,841
  5. Step 5: Solve for x
    x = 796,424,841/20,176
  6. Step 6: Final answer
    x = 39,473.87

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.