Home / 3,811.85-5,260.29-2,218.81

Finding the Fourth Proportional to 3,811.85, 5,260.29 and 2,218.81

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Solution

The fourth proportional to 3,811.85, 5,260.29 and 2,218.81 is: 3,061.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,811.85 : 5,260.29 = 2,218.81 : x
  2. Step 2: Convert to fraction form
    3,811.85/5,260.29 = 2,218.81/x
  3. Step 3: Cross multiply
    3,811.85x = 5,260.29 × 2,218.81
  4. Step 4: Simplify right side
    3,811.85x = 11,671,584.05
  5. Step 5: Solve for x
    x = 11,671,584.05/3,811.85
  6. Step 6: Final answer
    x = 3,061.92

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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.