Home / 4,979.94-6,871.68-2,990.85

Finding the Fourth Proportional to 4,979.94, 6,871.68 and 2,990.85

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Solution

The fourth proportional to 4,979.94, 6,871.68 and 2,990.85 is: 4,126.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,979.94 : 6,871.68 = 2,990.85 : x
  2. Step 2: Convert to fraction form
    4,979.94/6,871.68 = 2,990.85/x
  3. Step 3: Cross multiply
    4,979.94x = 6,871.68 × 2,990.85
  4. Step 4: Simplify right side
    4,979.94x = 20,552,164.13
  5. Step 5: Solve for x
    x = 20,552,164.13/4,979.94
  6. Step 6: Final answer
    x = 4,126.99

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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.