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Finding the Third Proportional to 8,289.75 and 12,555

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Solution

The third proportional to 8,289.75 and 12,555 is: 19,014.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,289.75 : 12,555 = 12,555 : x
  2. Step 2: Convert to fraction form
    8,289.75/12,555 = 12,555/x
  3. Step 3: Cross multiply
    8,289.75x = 12,555 × 12,555
  4. Step 4: Simplify right side
    8,289.75x = 157,628,025
  5. Step 5: Solve for x
    x = 157,628,025/8,289.75
  6. Step 6: Final answer
    x = 19,014.81

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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.