Home / 3,931.68-5,425.72-2,163.25

Finding the Fourth Proportional to 3,931.68, 5,425.72 and 2,163.25

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Solution

The fourth proportional to 3,931.68, 5,425.72 and 2,163.25 is: 2,985.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,931.68 : 5,425.72 = 2,163.25 : x
  2. Step 2: Convert to fraction form
    3,931.68/5,425.72 = 2,163.25/x
  3. Step 3: Cross multiply
    3,931.68x = 5,425.72 × 2,163.25
  4. Step 4: Simplify right side
    3,931.68x = 11,737,169.82
  5. Step 5: Solve for x
    x = 11,737,169.82/3,931.68
  6. Step 6: Final answer
    x = 2,985.28

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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.