Home / 3,979.09-5,495.22-2,982.79

Finding the Fourth Proportional to 3,979.09, 5,495.22 and 2,982.79

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Solution

The fourth proportional to 3,979.09, 5,495.22 and 2,982.79 is: 4,119.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.09 : 5,495.22 = 2,982.79 : x
  2. Step 2: Convert to fraction form
    3,979.09/5,495.22 = 2,982.79/x
  3. Step 3: Cross multiply
    3,979.09x = 5,495.22 × 2,982.79
  4. Step 4: Simplify right side
    3,979.09x = 16,391,087.26
  5. Step 5: Solve for x
    x = 16,391,087.26/3,979.09
  6. Step 6: Final answer
    x = 4,119.31

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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.