Home / 3,145.41-4,340.88-2,081.34

Finding the Fourth Proportional to 3,145.41, 4,340.88 and 2,081.34

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Solution

The fourth proportional to 3,145.41, 4,340.88 and 2,081.34 is: 2,872.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.41 : 4,340.88 = 2,081.34 : x
  2. Step 2: Convert to fraction form
    3,145.41/4,340.88 = 2,081.34/x
  3. Step 3: Cross multiply
    3,145.41x = 4,340.88 × 2,081.34
  4. Step 4: Simplify right side
    3,145.41x = 9,034,847.18
  5. Step 5: Solve for x
    x = 9,034,847.18/3,145.41
  6. Step 6: Final answer
    x = 2,872.39

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Half scale
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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.