Home / 3,979.81-5,491.83-2,211.26

Finding the Fourth Proportional to 3,979.81, 5,491.83 and 2,211.26

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Solution

The fourth proportional to 3,979.81, 5,491.83 and 2,211.26 is: 3,051.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.81 : 5,491.83 = 2,211.26 : x
  2. Step 2: Convert to fraction form
    3,979.81/5,491.83 = 2,211.26/x
  3. Step 3: Cross multiply
    3,979.81x = 5,491.83 × 2,211.26
  4. Step 4: Simplify right side
    3,979.81x = 12,143,864.01
  5. Step 5: Solve for x
    x = 12,143,864.01/3,979.81
  6. Step 6: Final answer
    x = 3,051.37

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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.