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Finding the Fourth Proportional to 6,388.66, 8,815.84 and 3,555.82

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Solution

The fourth proportional to 6,388.66, 8,815.84 and 3,555.82 is: 4,906.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,388.66 : 8,815.84 = 3,555.82 : x
  2. Step 2: Convert to fraction form
    6,388.66/8,815.84 = 3,555.82/x
  3. Step 3: Cross multiply
    6,388.66x = 8,815.84 × 3,555.82
  4. Step 4: Simplify right side
    6,388.66x = 31,347,540.19
  5. Step 5: Solve for x
    x = 31,347,540.19/6,388.66
  6. Step 6: Final answer
    x = 4,906.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.