Home / 3,987.07-5,502.13-2,218.64

Finding the Fourth Proportional to 3,987.07, 5,502.13 and 2,218.64

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Solution

The fourth proportional to 3,987.07, 5,502.13 and 2,218.64 is: 3,061.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.07 : 5,502.13 = 2,218.64 : x
  2. Step 2: Convert to fraction form
    3,987.07/5,502.13 = 2,218.64/x
  3. Step 3: Cross multiply
    3,987.07x = 5,502.13 × 2,218.64
  4. Step 4: Simplify right side
    3,987.07x = 12,207,243.60
  5. Step 5: Solve for x
    x = 12,207,243.60/3,987.07
  6. Step 6: Final answer
    x = 3,061.71

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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.