Home / 3,979.35-5,491.62-2,211.08

Finding the Fourth Proportional to 3,979.35, 5,491.62 and 2,211.08

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Solution

The fourth proportional to 3,979.35, 5,491.62 and 2,211.08 is: 3,051.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.35 : 5,491.62 = 2,211.08 : x
  2. Step 2: Convert to fraction form
    3,979.35/5,491.62 = 2,211.08/x
  3. Step 3: Cross multiply
    3,979.35x = 5,491.62 × 2,211.08
  4. Step 4: Simplify right side
    3,979.35x = 12,142,383.69
  5. Step 5: Solve for x
    x = 12,142,383.69/3,979.35
  6. Step 6: Final answer
    x = 3,051.35

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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.