Home / 3,979.53-5,491.97-2,211.10

Finding the Fourth Proportional to 3,979.53, 5,491.97 and 2,211.10

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Solution

The fourth proportional to 3,979.53, 5,491.97 and 2,211.10 is: 3,051.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.53 : 5,491.97 = 2,211.10 : x
  2. Step 2: Convert to fraction form
    3,979.53/5,491.97 = 2,211.10/x
  3. Step 3: Cross multiply
    3,979.53x = 5,491.97 × 2,211.10
  4. Step 4: Simplify right side
    3,979.53x = 12,143,278.37
  5. Step 5: Solve for x
    x = 12,143,278.37/3,979.53
  6. Step 6: Final answer
    x = 3,051.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.