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Finding the Third Proportional to 12,121.88 and 18,625.78

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Solution

The third proportional to 12,121.88 and 18,625.78 is: 28,619.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.88 : 18,625.78 = 18,625.78 : x
  2. Step 2: Convert to fraction form
    12,121.88/18,625.78 = 18,625.78/x
  3. Step 3: Cross multiply
    12,121.88x = 18,625.78 × 18,625.78
  4. Step 4: Simplify right side
    12,121.88x = 346,919,727.17
  5. Step 5: Solve for x
    x = 346,919,727.17/12,121.88
  6. Step 6: Final answer
    x = 28,619.31

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.