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Finding the Fourth Proportional to 4,879.65, 6,731.17 and 3,086.57

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Solution

The fourth proportional to 4,879.65, 6,731.17 and 3,086.57 is: 4,257.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,879.65 : 6,731.17 = 3,086.57 : x
  2. Step 2: Convert to fraction form
    4,879.65/6,731.17 = 3,086.57/x
  3. Step 3: Cross multiply
    4,879.65x = 6,731.17 × 3,086.57
  4. Step 4: Simplify right side
    4,879.65x = 20,776,236.50
  5. Step 5: Solve for x
    x = 20,776,236.50/4,879.65
  6. Step 6: Final answer
    x = 4,257.73

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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.