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Finding the Fourth Proportional to 6,879.90, 9,494.38 and 3,895.66

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Solution

The fourth proportional to 6,879.90, 9,494.38 and 3,895.66 is: 5,376.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,879.90 : 9,494.38 = 3,895.66 : x
  2. Step 2: Convert to fraction form
    6,879.90/9,494.38 = 3,895.66/x
  3. Step 3: Cross multiply
    6,879.90x = 9,494.38 × 3,895.66
  4. Step 4: Simplify right side
    6,879.90x = 36,986,866.65
  5. Step 5: Solve for x
    x = 36,986,866.65/6,879.90
  6. Step 6: Final answer
    x = 5,376.07

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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.