Home / 3,980.04-5,491.92-2,211.60

Finding the Fourth Proportional to 3,980.04, 5,491.92 and 2,211.60

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Solution

The fourth proportional to 3,980.04, 5,491.92 and 2,211.60 is: 3,051.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.04 : 5,491.92 = 2,211.60 : x
  2. Step 2: Convert to fraction form
    3,980.04/5,491.92 = 2,211.60/x
  3. Step 3: Cross multiply
    3,980.04x = 5,491.92 × 2,211.60
  4. Step 4: Simplify right side
    3,980.04x = 12,145,930.27
  5. Step 5: Solve for x
    x = 12,145,930.27/3,980.04
  6. Step 6: Final answer
    x = 3,051.71

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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.