Home / 5,811.21-8,716.86-2,111.85

Finding the Fourth Proportional to 5,811.21, 8,716.86 and 2,111.85

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Solution

The fourth proportional to 5,811.21, 8,716.86 and 2,111.85 is: 3,167.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,811.21 : 8,716.86 = 2,111.85 : x
  2. Step 2: Convert to fraction form
    5,811.21/8,716.86 = 2,111.85/x
  3. Step 3: Cross multiply
    5,811.21x = 8,716.86 × 2,111.85
  4. Step 4: Simplify right side
    5,811.21x = 18,408,700.79
  5. Step 5: Solve for x
    x = 18,408,700.79/5,811.21
  6. Step 6: Final answer
    x = 3,167.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.