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Finding the Third Proportional to 1,821.87 and 3,931.03

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Solution

The third proportional to 1,821.87 and 3,931.03 is: 8,481.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,821.87 : 3,931.03 = 3,931.03 : x
  2. Step 2: Convert to fraction form
    1,821.87/3,931.03 = 3,931.03/x
  3. Step 3: Cross multiply
    1,821.87x = 3,931.03 × 3,931.03
  4. Step 4: Simplify right side
    1,821.87x = 15,453,006.69
  5. Step 5: Solve for x
    x = 15,453,006.69/1,821.87
  6. Step 6: Final answer
    x = 8,481.96

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.