Home / 3,990.39-5,979.91-2,942.14

Finding the Fourth Proportional to 3,990.39, 5,979.91 and 2,942.14

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Solution

The fourth proportional to 3,990.39, 5,979.91 and 2,942.14 is: 4,409.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.39 : 5,979.91 = 2,942.14 : x
  2. Step 2: Convert to fraction form
    3,990.39/5,979.91 = 2,942.14/x
  3. Step 3: Cross multiply
    3,990.39x = 5,979.91 × 2,942.14
  4. Step 4: Simplify right side
    3,990.39x = 17,593,732.41
  5. Step 5: Solve for x
    x = 17,593,732.41/3,990.39
  6. Step 6: Final answer
    x = 4,409.03

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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.