Home / 4,121.07-5,687.55-3,991.87

Finding the Fourth Proportional to 4,121.07, 5,687.55 and 3,991.87

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Solution

The fourth proportional to 4,121.07, 5,687.55 and 3,991.87 is: 5,509.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,121.07 : 5,687.55 = 3,991.87 : x
  2. Step 2: Convert to fraction form
    4,121.07/5,687.55 = 3,991.87/x
  3. Step 3: Cross multiply
    4,121.07x = 5,687.55 × 3,991.87
  4. Step 4: Simplify right side
    4,121.07x = 22,703,960.22
  5. Step 5: Solve for x
    x = 22,703,960.22/4,121.07
  6. Step 6: Final answer
    x = 5,509.24

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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.