Home / 3,681.33-5,518.31-2,120.87

Finding the Fourth Proportional to 3,681.33, 5,518.31 and 2,120.87

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Solution

The fourth proportional to 3,681.33, 5,518.31 and 2,120.87 is: 3,179.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,681.33 : 5,518.31 = 2,120.87 : x
  2. Step 2: Convert to fraction form
    3,681.33/5,518.31 = 2,120.87/x
  3. Step 3: Cross multiply
    3,681.33x = 5,518.31 × 2,120.87
  4. Step 4: Simplify right side
    3,681.33x = 11,703,579.93
  5. Step 5: Solve for x
    x = 11,703,579.93/3,681.33
  6. Step 6: Final answer
    x = 3,179.17

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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.