Home / 5,129.94-7,079.32-2,891.84

Finding the Fourth Proportional to 5,129.94, 7,079.32 and 2,891.84

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Solution

The fourth proportional to 5,129.94, 7,079.32 and 2,891.84 is: 3,990.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.94 : 7,079.32 = 2,891.84 : x
  2. Step 2: Convert to fraction form
    5,129.94/7,079.32 = 2,891.84/x
  3. Step 3: Cross multiply
    5,129.94x = 7,079.32 × 2,891.84
  4. Step 4: Simplify right side
    5,129.94x = 20,472,260.75
  5. Step 5: Solve for x
    x = 20,472,260.75/5,129.94
  6. Step 6: Final answer
    x = 3,990.74

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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.