Home / 3,979.41-5,491.59-2,211.03

Finding the Fourth Proportional to 3,979.41, 5,491.59 and 2,211.03

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Solution

The fourth proportional to 3,979.41, 5,491.59 and 2,211.03 is: 3,051.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.41 : 5,491.59 = 2,211.03 : x
  2. Step 2: Convert to fraction form
    3,979.41/5,491.59 = 2,211.03/x
  3. Step 3: Cross multiply
    3,979.41x = 5,491.59 × 2,211.03
  4. Step 4: Simplify right side
    3,979.41x = 12,142,070.24
  5. Step 5: Solve for x
    x = 12,142,070.24/3,979.41
  6. Step 6: Final answer
    x = 3,051.22

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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.