Home / 3,991.08-5,509.48-2,857.64

Finding the Fourth Proportional to 3,991.08, 5,509.48 and 2,857.64

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Solution

The fourth proportional to 3,991.08, 5,509.48 and 2,857.64 is: 3,944.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.08 : 5,509.48 = 2,857.64 : x
  2. Step 2: Convert to fraction form
    3,991.08/5,509.48 = 2,857.64/x
  3. Step 3: Cross multiply
    3,991.08x = 5,509.48 × 2,857.64
  4. Step 4: Simplify right side
    3,991.08x = 15,744,110.43
  5. Step 5: Solve for x
    x = 15,744,110.43/3,991.08
  6. Step 6: Final answer
    x = 3,944.82

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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.