Home / 5,129.74-7,079.25-2,891.71

Finding the Fourth Proportional to 5,129.74, 7,079.25 and 2,891.71

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Solution

The fourth proportional to 5,129.74, 7,079.25 and 2,891.71 is: 3,990.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.74 : 7,079.25 = 2,891.71 : x
  2. Step 2: Convert to fraction form
    5,129.74/7,079.25 = 2,891.71/x
  3. Step 3: Cross multiply
    5,129.74x = 7,079.25 × 2,891.71
  4. Step 4: Simplify right side
    5,129.74x = 20,471,138.02
  5. Step 5: Solve for x
    x = 20,471,138.02/5,129.74
  6. Step 6: Final answer
    x = 3,990.68

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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.