Home / 5,171.81-7,137.38-2,813.90

Finding the Fourth Proportional to 5,171.81, 7,137.38 and 2,813.90

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Solution

The fourth proportional to 5,171.81, 7,137.38 and 2,813.90 is: 3,883.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,171.81 : 7,137.38 = 2,813.90 : x
  2. Step 2: Convert to fraction form
    5,171.81/7,137.38 = 2,813.90/x
  3. Step 3: Cross multiply
    5,171.81x = 7,137.38 × 2,813.90
  4. Step 4: Simplify right side
    5,171.81x = 20,083,844.93
  5. Step 5: Solve for x
    x = 20,083,844.93/5,171.81
  6. Step 6: Final answer
    x = 3,883.33

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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.