Home / 3,979.55-5,491.83-2,211.16

Finding the Fourth Proportional to 3,979.55, 5,491.83 and 2,211.16

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Solution

The fourth proportional to 3,979.55, 5,491.83 and 2,211.16 is: 3,051.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.55 : 5,491.83 = 2,211.16 : x
  2. Step 2: Convert to fraction form
    3,979.55/5,491.83 = 2,211.16/x
  3. Step 3: Cross multiply
    3,979.55x = 5,491.83 × 2,211.16
  4. Step 4: Simplify right side
    3,979.55x = 12,143,287.36
  5. Step 5: Solve for x
    x = 12,143,287.36/3,979.55
  6. Step 6: Final answer
    x = 3,051.42

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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.