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Finding the Third Proportional to 12,888 and 20,208

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Solution

The third proportional to 12,888 and 20,208 is: 31,685.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,888 : 20,208 = 20,208 : x
  2. Step 2: Convert to fraction form
    12,888/20,208 = 20,208/x
  3. Step 3: Cross multiply
    12,888x = 20,208 × 20,208
  4. Step 4: Simplify right side
    12,888x = 408,363,264
  5. Step 5: Solve for x
    x = 408,363,264/12,888
  6. Step 6: Final answer
    x = 31,685.54

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.