Home / 3,811.86-5,717.79-2,146.11

Finding the Fourth Proportional to 3,811.86, 5,717.79 and 2,146.11

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Solution

The fourth proportional to 3,811.86, 5,717.79 and 2,146.11 is: 3,219.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,811.86 : 5,717.79 = 2,146.11 : x
  2. Step 2: Convert to fraction form
    3,811.86/5,717.79 = 2,146.11/x
  3. Step 3: Cross multiply
    3,811.86x = 5,717.79 × 2,146.11
  4. Step 4: Simplify right side
    3,811.86x = 12,271,006.30
  5. Step 5: Solve for x
    x = 12,271,006.30/3,811.86
  6. Step 6: Final answer
    x = 3,219.17

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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.