Home / 2,982.38-4,118.91-1,991.84

Finding the Fourth Proportional to 2,982.38, 4,118.91 and 1,991.84

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Solution

The fourth proportional to 2,982.38, 4,118.91 and 1,991.84 is: 2,750.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,982.38 : 4,118.91 = 1,991.84 : x
  2. Step 2: Convert to fraction form
    2,982.38/4,118.91 = 1,991.84/x
  3. Step 3: Cross multiply
    2,982.38x = 4,118.91 × 1,991.84
  4. Step 4: Simplify right side
    2,982.38x = 8,204,209.69
  5. Step 5: Solve for x
    x = 8,204,209.69/2,982.38
  6. Step 6: Final answer
    x = 2,750.89

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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.