Home / 7,121.38-10,672.78-5,153.64

Finding the Fourth Proportional to 7,121.38, 10,672.78 and 5,153.64

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Solution

The fourth proportional to 7,121.38, 10,672.78 and 5,153.64 is: 7,723.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.38 : 10,672.78 = 5,153.64 : x
  2. Step 2: Convert to fraction form
    7,121.38/10,672.78 = 5,153.64/x
  3. Step 3: Cross multiply
    7,121.38x = 10,672.78 × 5,153.64
  4. Step 4: Simplify right side
    7,121.38x = 55,003,613.01
  5. Step 5: Solve for x
    x = 55,003,613.01/7,121.38
  6. Step 6: Final answer
    x = 7,723.73

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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.