Home / 8,190.66-12,288.42-3,811.80

Finding the Fourth Proportional to 8,190.66, 12,288.42 and 3,811.80

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Solution

The fourth proportional to 8,190.66, 12,288.42 and 3,811.80 is: 5,718.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,190.66 : 12,288.42 = 3,811.80 : x
  2. Step 2: Convert to fraction form
    8,190.66/12,288.42 = 3,811.80/x
  3. Step 3: Cross multiply
    8,190.66x = 12,288.42 × 3,811.80
  4. Step 4: Simplify right side
    8,190.66x = 46,840,999.36
  5. Step 5: Solve for x
    x = 46,840,999.36/8,190.66
  6. Step 6: Final answer
    x = 5,718.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.