Home / 3,717.75-5,129.61-2,145.87

Finding the Fourth Proportional to 3,717.75, 5,129.61 and 2,145.87

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Solution

The fourth proportional to 3,717.75, 5,129.61 and 2,145.87 is: 2,960.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,717.75 : 5,129.61 = 2,145.87 : x
  2. Step 2: Convert to fraction form
    3,717.75/5,129.61 = 2,145.87/x
  3. Step 3: Cross multiply
    3,717.75x = 5,129.61 × 2,145.87
  4. Step 4: Simplify right side
    3,717.75x = 11,007,476.21
  5. Step 5: Solve for x
    x = 11,007,476.21/3,717.75
  6. Step 6: Final answer
    x = 2,960.79

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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.