Home / 3,987.52-5,502.32-2,218.88

Finding the Fourth Proportional to 3,987.52, 5,502.32 and 2,218.88

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Solution

The fourth proportional to 3,987.52, 5,502.32 and 2,218.88 is: 3,061.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.52 : 5,502.32 = 2,218.88 : x
  2. Step 2: Convert to fraction form
    3,987.52/5,502.32 = 2,218.88/x
  3. Step 3: Cross multiply
    3,987.52x = 5,502.32 × 2,218.88
  4. Step 4: Simplify right side
    3,987.52x = 12,208,987.80
  5. Step 5: Solve for x
    x = 12,208,987.80/3,987.52
  6. Step 6: Final answer
    x = 3,061.80

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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.