Home / 7,121.42-10,661.38-4,150.78

Finding the Fourth Proportional to 7,121.42, 10,661.38 and 4,150.78

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Solution

The fourth proportional to 7,121.42, 10,661.38 and 4,150.78 is: 6,214.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.42 : 10,661.38 = 4,150.78 : x
  2. Step 2: Convert to fraction form
    7,121.42/10,661.38 = 4,150.78/x
  3. Step 3: Cross multiply
    7,121.42x = 10,661.38 × 4,150.78
  4. Step 4: Simplify right side
    7,121.42x = 44,253,045.83
  5. Step 5: Solve for x
    x = 44,253,045.83/7,121.42
  6. Step 6: Final answer
    x = 6,214.07

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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.