Home / 3,115.52-4,294.44-2,120.48

Finding the Fourth Proportional to 3,115.52, 4,294.44 and 2,120.48

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Solution

The fourth proportional to 3,115.52, 4,294.44 and 2,120.48 is: 2,922.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.52 : 4,294.44 = 2,120.48 : x
  2. Step 2: Convert to fraction form
    3,115.52/4,294.44 = 2,120.48/x
  3. Step 3: Cross multiply
    3,115.52x = 4,294.44 × 2,120.48
  4. Step 4: Simplify right side
    3,115.52x = 9,106,274.13
  5. Step 5: Solve for x
    x = 9,106,274.13/3,115.52
  6. Step 6: Final answer
    x = 2,922.87

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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.