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Finding the Fourth Proportional to 6,409.36, 8,843.40 and 3,891.38

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Solution

The fourth proportional to 6,409.36, 8,843.40 and 3,891.38 is: 5,369.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,409.36 : 8,843.40 = 3,891.38 : x
  2. Step 2: Convert to fraction form
    6,409.36/8,843.40 = 3,891.38/x
  3. Step 3: Cross multiply
    6,409.36x = 8,843.40 × 3,891.38
  4. Step 4: Simplify right side
    6,409.36x = 34,413,029.89
  5. Step 5: Solve for x
    x = 34,413,029.89/6,409.36
  6. Step 6: Final answer
    x = 5,369.18

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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.