Home / 3,986.91-5,501.61-2,218.41

Finding the Fourth Proportional to 3,986.91, 5,501.61 and 2,218.41

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Solution

The fourth proportional to 3,986.91, 5,501.61 and 2,218.41 is: 3,061.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,986.91 : 5,501.61 = 2,218.41 : x
  2. Step 2: Convert to fraction form
    3,986.91/5,501.61 = 2,218.41/x
  3. Step 3: Cross multiply
    3,986.91x = 5,501.61 × 2,218.41
  4. Step 4: Simplify right side
    3,986.91x = 12,204,826.64
  5. Step 5: Solve for x
    x = 12,204,826.64/3,986.91
  6. Step 6: Final answer
    x = 3,061.22

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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.