Home / 3,853.70-5,318.15-2,175.20

Finding the Fourth Proportional to 3,853.70, 5,318.15 and 2,175.20

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Solution

The fourth proportional to 3,853.70, 5,318.15 and 2,175.20 is: 3,001.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,853.70 : 5,318.15 = 2,175.20 : x
  2. Step 2: Convert to fraction form
    3,853.70/5,318.15 = 2,175.20/x
  3. Step 3: Cross multiply
    3,853.70x = 5,318.15 × 2,175.20
  4. Step 4: Simplify right side
    3,853.70x = 11,568,039.88
  5. Step 5: Solve for x
    x = 11,568,039.88/3,853.70
  6. Step 6: Final answer
    x = 3,001.80

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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.