Home / 8,121.68-12,183.54-2,855.45

Finding the Fourth Proportional to 8,121.68, 12,183.54 and 2,855.45

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Solution

The fourth proportional to 8,121.68, 12,183.54 and 2,855.45 is: 4,283.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.68 : 12,183.54 = 2,855.45 : x
  2. Step 2: Convert to fraction form
    8,121.68/12,183.54 = 2,855.45/x
  3. Step 3: Cross multiply
    8,121.68x = 12,183.54 × 2,855.45
  4. Step 4: Simplify right side
    8,121.68x = 34,789,511.66
  5. Step 5: Solve for x
    x = 34,789,511.66/8,121.68
  6. Step 6: Final answer
    x = 4,283.54

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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.