Home / 3,987.19-5,502.34-2,218.80

Finding the Fourth Proportional to 3,987.19, 5,502.34 and 2,218.80

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Solution

The fourth proportional to 3,987.19, 5,502.34 and 2,218.80 is: 3,061.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.19 : 5,502.34 = 2,218.80 : x
  2. Step 2: Convert to fraction form
    3,987.19/5,502.34 = 2,218.80/x
  3. Step 3: Cross multiply
    3,987.19x = 5,502.34 × 2,218.80
  4. Step 4: Simplify right side
    3,987.19x = 12,208,591.99
  5. Step 5: Solve for x
    x = 12,208,591.99/3,987.19
  6. Step 6: Final answer
    x = 3,061.95

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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.