Home / 10,912.88-16,369.32-3,121.70

Finding the Fourth Proportional to 10,912.88, 16,369.32 and 3,121.70

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Solution

The fourth proportional to 10,912.88, 16,369.32 and 3,121.70 is: 4,682.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,912.88 : 16,369.32 = 3,121.70 : x
  2. Step 2: Convert to fraction form
    10,912.88/16,369.32 = 3,121.70/x
  3. Step 3: Cross multiply
    10,912.88x = 16,369.32 × 3,121.70
  4. Step 4: Simplify right side
    10,912.88x = 51,100,024.40
  5. Step 5: Solve for x
    x = 51,100,024.40/10,912.88
  6. Step 6: Final answer
    x = 4,682.54

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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.