Home / 3,931.68-5,425.92-2,163.18

Finding the Fourth Proportional to 3,931.68, 5,425.92 and 2,163.18

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Solution

The fourth proportional to 3,931.68, 5,425.92 and 2,163.18 is: 2,985.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,931.68 : 5,425.92 = 2,163.18 : x
  2. Step 2: Convert to fraction form
    3,931.68/5,425.92 = 2,163.18/x
  3. Step 3: Cross multiply
    3,931.68x = 5,425.92 × 2,163.18
  4. Step 4: Simplify right side
    3,931.68x = 11,737,241.63
  5. Step 5: Solve for x
    x = 11,737,241.63/3,931.68
  6. Step 6: Final answer
    x = 2,985.30

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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.