Home / 3,781.58-5,217.81-2,187.86

Finding the Fourth Proportional to 3,781.58, 5,217.81 and 2,187.86

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Solution

The fourth proportional to 3,781.58, 5,217.81 and 2,187.86 is: 3,018.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.58 : 5,217.81 = 2,187.86 : x
  2. Step 2: Convert to fraction form
    3,781.58/5,217.81 = 2,187.86/x
  3. Step 3: Cross multiply
    3,781.58x = 5,217.81 × 2,187.86
  4. Step 4: Simplify right side
    3,781.58x = 11,415,837.79
  5. Step 5: Solve for x
    x = 11,415,837.79/3,781.58
  6. Step 6: Final answer
    x = 3,018.80

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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.