Home / 3,115.31-4,296.92-2,118.89

Finding the Fourth Proportional to 3,115.31, 4,296.92 and 2,118.89

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Solution

The fourth proportional to 3,115.31, 4,296.92 and 2,118.89 is: 2,922.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.31 : 4,296.92 = 2,118.89 : x
  2. Step 2: Convert to fraction form
    3,115.31/4,296.92 = 2,118.89/x
  3. Step 3: Cross multiply
    3,115.31x = 4,296.92 × 2,118.89
  4. Step 4: Simplify right side
    3,115.31x = 9,104,668.74
  5. Step 5: Solve for x
    x = 9,104,668.74/3,115.31
  6. Step 6: Final answer
    x = 2,922.56

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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.