Home / 3,986.76-5,501.91-2,218.48

Finding the Fourth Proportional to 3,986.76, 5,501.91 and 2,218.48

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Solution

The fourth proportional to 3,986.76, 5,501.91 and 2,218.48 is: 3,061.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,986.76 : 5,501.91 = 2,218.48 : x
  2. Step 2: Convert to fraction form
    3,986.76/5,501.91 = 2,218.48/x
  3. Step 3: Cross multiply
    3,986.76x = 5,501.91 × 2,218.48
  4. Step 4: Simplify right side
    3,986.76x = 12,205,884.22
  5. Step 5: Solve for x
    x = 12,205,884.22/3,986.76
  6. Step 6: Final answer
    x = 3,061.60

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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.