Home / 3,979.74-5,491.88-2,211.47

Finding the Fourth Proportional to 3,979.74, 5,491.88 and 2,211.47

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Solution

The fourth proportional to 3,979.74, 5,491.88 and 2,211.47 is: 3,051.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.74 : 5,491.88 = 2,211.47 : x
  2. Step 2: Convert to fraction form
    3,979.74/5,491.88 = 2,211.47/x
  3. Step 3: Cross multiply
    3,979.74x = 5,491.88 × 2,211.47
  4. Step 4: Simplify right side
    3,979.74x = 12,145,118.23
  5. Step 5: Solve for x
    x = 12,145,118.23/3,979.74
  6. Step 6: Final answer
    x = 3,051.73

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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.