Home / 12,121.12-18,183.84-4,340.80

Finding the Fourth Proportional to 12,121.12, 18,183.84 and 4,340.80

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Solution

The fourth proportional to 12,121.12, 18,183.84 and 4,340.80 is: 6,511.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.12 : 18,183.84 = 4,340.80 : x
  2. Step 2: Convert to fraction form
    12,121.12/18,183.84 = 4,340.80/x
  3. Step 3: Cross multiply
    12,121.12x = 18,183.84 × 4,340.80
  4. Step 4: Simplify right side
    12,121.12x = 78,932,412.67
  5. Step 5: Solve for x
    x = 78,932,412.67/12,121.12
  6. Step 6: Final answer
    x = 6,511.97

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1.5x scale

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.