Home / 3,986.98-5,502.18-2,218.71

Finding the Fourth Proportional to 3,986.98, 5,502.18 and 2,218.71

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Solution

The fourth proportional to 3,986.98, 5,502.18 and 2,218.71 is: 3,061.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,986.98 : 5,502.18 = 2,218.71 : x
  2. Step 2: Convert to fraction form
    3,986.98/5,502.18 = 2,218.71/x
  3. Step 3: Cross multiply
    3,986.98x = 5,502.18 × 2,218.71
  4. Step 4: Simplify right side
    3,986.98x = 12,207,741.79
  5. Step 5: Solve for x
    x = 12,207,741.79/3,986.98
  6. Step 6: Final answer
    x = 3,061.90

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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.