Home / 12,121.45-18,183.99-4,328.44

Finding the Fourth Proportional to 12,121.45, 18,183.99 and 4,328.44

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Solution

The fourth proportional to 12,121.45, 18,183.99 and 4,328.44 is: 6,493.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.45 : 18,183.99 = 4,328.44 : x
  2. Step 2: Convert to fraction form
    12,121.45/18,183.99 = 4,328.44/x
  3. Step 3: Cross multiply
    12,121.45x = 18,183.99 × 4,328.44
  4. Step 4: Simplify right side
    12,121.45x = 78,708,280.45
  5. Step 5: Solve for x
    x = 78,708,280.45/12,121.45
  6. Step 6: Final answer
    x = 6,493.31

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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.