Home / 5,161.28-7,131.68-4,121.92

Finding the Fourth Proportional to 5,161.28, 7,131.68 and 4,121.92

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Solution

The fourth proportional to 5,161.28, 7,131.68 and 4,121.92 is: 5,695.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,161.28 : 7,131.68 = 4,121.92 : x
  2. Step 2: Convert to fraction form
    5,161.28/7,131.68 = 4,121.92/x
  3. Step 3: Cross multiply
    5,161.28x = 7,131.68 × 4,121.92
  4. Step 4: Simplify right side
    5,161.28x = 29,396,214.43
  5. Step 5: Solve for x
    x = 29,396,214.43/5,161.28
  6. Step 6: Final answer
    x = 5,695.53

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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.