Home / 3,858.12-5,791.20-1,911.72

Finding the Fourth Proportional to 3,858.12, 5,791.20 and 1,911.72

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Solution

The fourth proportional to 3,858.12, 5,791.20 and 1,911.72 is: 2,869.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,858.12 : 5,791.20 = 1,911.72 : x
  2. Step 2: Convert to fraction form
    3,858.12/5,791.20 = 1,911.72/x
  3. Step 3: Cross multiply
    3,858.12x = 5,791.20 × 1,911.72
  4. Step 4: Simplify right side
    3,858.12x = 11,071,152.86
  5. Step 5: Solve for x
    x = 11,071,152.86/3,858.12
  6. Step 6: Final answer
    x = 2,869.57

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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.