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Finding the Fourth Proportional to 6,409.35, 8,843.40 and 3,891.39

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Solution

The fourth proportional to 6,409.35, 8,843.40 and 3,891.39 is: 5,369.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,409.35 : 8,843.40 = 3,891.39 : x
  2. Step 2: Convert to fraction form
    6,409.35/8,843.40 = 3,891.39/x
  3. Step 3: Cross multiply
    6,409.35x = 8,843.40 × 3,891.39
  4. Step 4: Simplify right side
    6,409.35x = 34,413,118.33
  5. Step 5: Solve for x
    x = 34,413,118.33/6,409.35
  6. Step 6: Final answer
    x = 5,369.21

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1.5x scale

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.