Home / 3,979.50-5,491.99-2,211.11

Finding the Fourth Proportional to 3,979.50, 5,491.99 and 2,211.11

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Solution

The fourth proportional to 3,979.50, 5,491.99 and 2,211.11 is: 3,051.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.50 : 5,491.99 = 2,211.11 : x
  2. Step 2: Convert to fraction form
    3,979.50/5,491.99 = 2,211.11/x
  3. Step 3: Cross multiply
    3,979.50x = 5,491.99 × 2,211.11
  4. Step 4: Simplify right side
    3,979.50x = 12,143,394.52
  5. Step 5: Solve for x
    x = 12,143,394.52/3,979.50
  6. Step 6: Final answer
    x = 3,051.48

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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.