Home / 3,121.58-4,298.59-2,789.89

Finding the Fourth Proportional to 3,121.58, 4,298.59 and 2,789.89

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Solution

The fourth proportional to 3,121.58, 4,298.59 and 2,789.89 is: 3,841.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.58 : 4,298.59 = 2,789.89 : x
  2. Step 2: Convert to fraction form
    3,121.58/4,298.59 = 2,789.89/x
  3. Step 3: Cross multiply
    3,121.58x = 4,298.59 × 2,789.89
  4. Step 4: Simplify right side
    3,121.58x = 11,992,593.26
  5. Step 5: Solve for x
    x = 11,992,593.26/3,121.58
  6. Step 6: Final answer
    x = 3,841.83

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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.