Home / 3,979.77-5,491.66-2,211.34

Finding the Fourth Proportional to 3,979.77, 5,491.66 and 2,211.34

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Solution

The fourth proportional to 3,979.77, 5,491.66 and 2,211.34 is: 3,051.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.77 : 5,491.66 = 2,211.34 : x
  2. Step 2: Convert to fraction form
    3,979.77/5,491.66 = 2,211.34/x
  3. Step 3: Cross multiply
    3,979.77x = 5,491.66 × 2,211.34
  4. Step 4: Simplify right side
    3,979.77x = 12,143,927.42
  5. Step 5: Solve for x
    x = 12,143,927.42/3,979.77
  6. Step 6: Final answer
    x = 3,051.41

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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.