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Finding the Fourth Proportional to 8,322.62, 12,486.65 and 3,939.48

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Solution

The fourth proportional to 8,322.62, 12,486.65 and 3,939.48 is: 5,910.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,322.62 : 12,486.65 = 3,939.48 : x
  2. Step 2: Convert to fraction form
    8,322.62/12,486.65 = 3,939.48/x
  3. Step 3: Cross multiply
    8,322.62x = 12,486.65 × 3,939.48
  4. Step 4: Simplify right side
    8,322.62x = 49,190,888.24
  5. Step 5: Solve for x
    x = 49,190,888.24/8,322.62
  6. Step 6: Final answer
    x = 5,910.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.