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Finding the Third Proportional to 2,531.25 and 5,187.80

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Solution

The third proportional to 2,531.25 and 5,187.80 is: 10,632.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,531.25 : 5,187.80 = 5,187.80 : x
  2. Step 2: Convert to fraction form
    2,531.25/5,187.80 = 5,187.80/x
  3. Step 3: Cross multiply
    2,531.25x = 5,187.80 × 5,187.80
  4. Step 4: Simplify right side
    2,531.25x = 26,913,236.42
  5. Step 5: Solve for x
    x = 26,913,236.42/2,531.25
  6. Step 6: Final answer
    x = 10,632.39

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.