Home / 3,869.08-5,813.78-2,115.22

Finding the Fourth Proportional to 3,869.08, 5,813.78 and 2,115.22

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Solution

The fourth proportional to 3,869.08, 5,813.78 and 2,115.22 is: 3,178.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,869.08 : 5,813.78 = 2,115.22 : x
  2. Step 2: Convert to fraction form
    3,869.08/5,813.78 = 2,115.22/x
  3. Step 3: Cross multiply
    3,869.08x = 5,813.78 × 2,115.22
  4. Step 4: Simplify right side
    3,869.08x = 12,297,423.73
  5. Step 5: Solve for x
    x = 12,297,423.73/3,869.08
  6. Step 6: Final answer
    x = 3,178.38

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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.