Home / 2,979.80-4,110.78-2,096.20

Finding the Fourth Proportional to 2,979.80, 4,110.78 and 2,096.20

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Solution

The fourth proportional to 2,979.80, 4,110.78 and 2,096.20 is: 2,891.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,979.80 : 4,110.78 = 2,096.20 : x
  2. Step 2: Convert to fraction form
    2,979.80/4,110.78 = 2,096.20/x
  3. Step 3: Cross multiply
    2,979.80x = 4,110.78 × 2,096.20
  4. Step 4: Simplify right side
    2,979.80x = 8,617,017.04
  5. Step 5: Solve for x
    x = 8,617,017.04/2,979.80
  6. Step 6: Final answer
    x = 2,891.81

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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.