Home / 3,081.51-4,251.42-2,085.21

Finding the Fourth Proportional to 3,081.51, 4,251.42 and 2,085.21

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Solution

The fourth proportional to 3,081.51, 4,251.42 and 2,085.21 is: 2,876.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,081.51 : 4,251.42 = 2,085.21 : x
  2. Step 2: Convert to fraction form
    3,081.51/4,251.42 = 2,085.21/x
  3. Step 3: Cross multiply
    3,081.51x = 4,251.42 × 2,085.21
  4. Step 4: Simplify right side
    3,081.51x = 8,865,103.50
  5. Step 5: Solve for x
    x = 8,865,103.50/3,081.51
  6. Step 6: Final answer
    x = 2,876.87

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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.