Home / 3,987.05-5,502.11-2,218.66

Finding the Fourth Proportional to 3,987.05, 5,502.11 and 2,218.66

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Solution

The fourth proportional to 3,987.05, 5,502.11 and 2,218.66 is: 3,061.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.05 : 5,502.11 = 2,218.66 : x
  2. Step 2: Convert to fraction form
    3,987.05/5,502.11 = 2,218.66/x
  3. Step 3: Cross multiply
    3,987.05x = 5,502.11 × 2,218.66
  4. Step 4: Simplify right side
    3,987.05x = 12,207,286.52
  5. Step 5: Solve for x
    x = 12,207,286.52/3,987.05
  6. Step 6: Final answer
    x = 3,061.74

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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.