Home / 3,979.92-5,491.35-2,783.42

Finding the Fourth Proportional to 3,979.92, 5,491.35 and 2,783.42

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Solution

The fourth proportional to 3,979.92, 5,491.35 and 2,783.42 is: 3,840.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.92 : 5,491.35 = 2,783.42 : x
  2. Step 2: Convert to fraction form
    3,979.92/5,491.35 = 2,783.42/x
  3. Step 3: Cross multiply
    3,979.92x = 5,491.35 × 2,783.42
  4. Step 4: Simplify right side
    3,979.92x = 15,284,705.96
  5. Step 5: Solve for x
    x = 15,284,705.96/3,979.92
  6. Step 6: Final answer
    x = 3,840.46

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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.