Home / 3,931.40-5,425.08-2,163.08

Finding the Fourth Proportional to 3,931.40, 5,425.08 and 2,163.08

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Solution

The fourth proportional to 3,931.40, 5,425.08 and 2,163.08 is: 2,984.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,931.40 : 5,425.08 = 2,163.08 : x
  2. Step 2: Convert to fraction form
    3,931.40/5,425.08 = 2,163.08/x
  3. Step 3: Cross multiply
    3,931.40x = 5,425.08 × 2,163.08
  4. Step 4: Simplify right side
    3,931.40x = 11,734,882.05
  5. Step 5: Solve for x
    x = 11,734,882.05/3,931.40
  6. Step 6: Final answer
    x = 2,984.91

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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.