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Finding the Third Proportional to 18,876 and 28,560

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Solution

The third proportional to 18,876 and 28,560 is: 43,212.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,876 : 28,560 = 28,560 : x
  2. Step 2: Convert to fraction form
    18,876/28,560 = 28,560/x
  3. Step 3: Cross multiply
    18,876x = 28,560 × 28,560
  4. Step 4: Simplify right side
    18,876x = 815,673,600
  5. Step 5: Solve for x
    x = 815,673,600/18,876
  6. Step 6: Final answer
    x = 43,212.21

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.