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Finding the Third Proportional to 3,661.50 and 8,143.50

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Solution

The third proportional to 3,661.50 and 8,143.50 is: 18,111.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,661.50 : 8,143.50 = 8,143.50 : x
  2. Step 2: Convert to fraction form
    3,661.50/8,143.50 = 8,143.50/x
  3. Step 3: Cross multiply
    3,661.50x = 8,143.50 × 8,143.50
  4. Step 4: Simplify right side
    3,661.50x = 66,316,592.25
  5. Step 5: Solve for x
    x = 66,316,592.25/3,661.50
  6. Step 6: Final answer
    x = 18,111.86

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Why These Related Problems?

These problems maintain the same ratio (2.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.