Home / 3,781.32-5,218.43-2,188.23

Finding the Fourth Proportional to 3,781.32, 5,218.43 and 2,188.23

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Solution

The fourth proportional to 3,781.32, 5,218.43 and 2,188.23 is: 3,019.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.32 : 5,218.43 = 2,188.23 : x
  2. Step 2: Convert to fraction form
    3,781.32/5,218.43 = 2,188.23/x
  3. Step 3: Cross multiply
    3,781.32x = 5,218.43 × 2,188.23
  4. Step 4: Simplify right side
    3,781.32x = 11,419,125.08
  5. Step 5: Solve for x
    x = 11,419,125.08/3,781.32
  6. Step 6: Final answer
    x = 3,019.88

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Half scale
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Double 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.