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Finding the Third Proportional to 15,108 and 20,678

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Solution

The third proportional to 15,108 and 20,678 is: 28,301.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,108 : 20,678 = 20,678 : x
  2. Step 2: Convert to fraction form
    15,108/20,678 = 20,678/x
  3. Step 3: Cross multiply
    15,108x = 20,678 × 20,678
  4. Step 4: Simplify right side
    15,108x = 427,579,684
  5. Step 5: Solve for x
    x = 427,579,684/15,108
  6. Step 6: Final answer
    x = 28,301.54

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.