Home / 2,836.80-3,919.32-2,209.68

Finding the Fourth Proportional to 2,836.80, 3,919.32 and 2,209.68

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Solution

The fourth proportional to 2,836.80, 3,919.32 and 2,209.68 is: 3,052.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,836.80 : 3,919.32 = 2,209.68 : x
  2. Step 2: Convert to fraction form
    2,836.80/3,919.32 = 2,209.68/x
  3. Step 3: Cross multiply
    2,836.80x = 3,919.32 × 2,209.68
  4. Step 4: Simplify right side
    2,836.80x = 8,660,443.02
  5. Step 5: Solve for x
    x = 8,660,443.02/2,836.80
  6. Step 6: Final answer
    x = 3,052.89

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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.