Home / 3,781.47-5,216.99-2,789.12

Finding the Fourth Proportional to 3,781.47, 5,216.99 and 2,789.12

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Solution

The fourth proportional to 3,781.47, 5,216.99 and 2,789.12 is: 3,847.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.47 : 5,216.99 = 2,789.12 : x
  2. Step 2: Convert to fraction form
    3,781.47/5,216.99 = 2,789.12/x
  3. Step 3: Cross multiply
    3,781.47x = 5,216.99 × 2,789.12
  4. Step 4: Simplify right side
    3,781.47x = 14,550,771.12
  5. Step 5: Solve for x
    x = 14,550,771.12/3,781.47
  6. Step 6: Final answer
    x = 3,847.91

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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.