Home / 3,891.38-5,837.34-1,918.05

Finding the Fourth Proportional to 3,891.38, 5,837.34 and 1,918.05

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Solution

The fourth proportional to 3,891.38, 5,837.34 and 1,918.05 is: 2,877.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.38 : 5,837.34 = 1,918.05 : x
  2. Step 2: Convert to fraction form
    3,891.38/5,837.34 = 1,918.05/x
  3. Step 3: Cross multiply
    3,891.38x = 5,837.34 × 1,918.05
  4. Step 4: Simplify right side
    3,891.38x = 11,196,309.99
  5. Step 5: Solve for x
    x = 11,196,309.99/3,891.38
  6. Step 6: Final answer
    x = 2,877.21

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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.