Home / 5,255.21-7,885.11-2,912.39

Finding the Fourth Proportional to 5,255.21, 7,885.11 and 2,912.39

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Solution

The fourth proportional to 5,255.21, 7,885.11 and 2,912.39 is: 4,369.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,255.21 : 7,885.11 = 2,912.39 : x
  2. Step 2: Convert to fraction form
    5,255.21/7,885.11 = 2,912.39/x
  3. Step 3: Cross multiply
    5,255.21x = 7,885.11 × 2,912.39
  4. Step 4: Simplify right side
    5,255.21x = 22,964,516.58
  5. Step 5: Solve for x
    x = 22,964,516.58/5,255.21
  6. Step 6: Final answer
    x = 4,369.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.