Home / 3,979.64-5,491.32-2,211.26

Finding the Fourth Proportional to 3,979.64, 5,491.32 and 2,211.26

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Solution

The fourth proportional to 3,979.64, 5,491.32 and 2,211.26 is: 3,051.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.64 : 5,491.32 = 2,211.26 : x
  2. Step 2: Convert to fraction form
    3,979.64/5,491.32 = 2,211.26/x
  3. Step 3: Cross multiply
    3,979.64x = 5,491.32 × 2,211.26
  4. Step 4: Simplify right side
    3,979.64x = 12,142,736.26
  5. Step 5: Solve for x
    x = 12,142,736.26/3,979.64
  6. Step 6: Final answer
    x = 3,051.21

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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.