Home / 3,979.13-5,491.22-2,186.76

Finding the Fourth Proportional to 3,979.13, 5,491.22 and 2,186.76

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Solution

The fourth proportional to 3,979.13, 5,491.22 and 2,186.76 is: 3,017.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.13 : 5,491.22 = 2,186.76 : x
  2. Step 2: Convert to fraction form
    3,979.13/5,491.22 = 2,186.76/x
  3. Step 3: Cross multiply
    3,979.13x = 5,491.22 × 2,186.76
  4. Step 4: Simplify right side
    3,979.13x = 12,007,969.31
  5. Step 5: Solve for x
    x = 12,007,969.31/3,979.13
  6. Step 6: Final answer
    x = 3,017.74

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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.