Home / 3,081.80-4,251.12-2,085.32

Finding the Fourth Proportional to 3,081.80, 4,251.12 and 2,085.32

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Solution

The fourth proportional to 3,081.80, 4,251.12 and 2,085.32 is: 2,876.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,081.80 : 4,251.12 = 2,085.32 : x
  2. Step 2: Convert to fraction form
    3,081.80/4,251.12 = 2,085.32/x
  3. Step 3: Cross multiply
    3,081.80x = 4,251.12 × 2,085.32
  4. Step 4: Simplify right side
    3,081.80x = 8,864,945.56
  5. Step 5: Solve for x
    x = 8,864,945.56/3,081.80
  6. Step 6: Final answer
    x = 2,876.55

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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.