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Finding the Third Proportional to 5,451.75 and 8,218.69

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Solution

The third proportional to 5,451.75 and 8,218.69 is: 12,389.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,451.75 : 8,218.69 = 8,218.69 : x
  2. Step 2: Convert to fraction form
    5,451.75/8,218.69 = 8,218.69/x
  3. Step 3: Cross multiply
    5,451.75x = 8,218.69 × 8,218.69
  4. Step 4: Simplify right side
    5,451.75x = 67,546,824.22
  5. Step 5: Solve for x
    x = 67,546,824.22/5,451.75
  6. Step 6: Final answer
    x = 12,389.93

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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.