Home / 3,789-5,228.78-2,110.31

Finding the Fourth Proportional to 3,789, 5,228.78 and 2,110.31

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Solution

The fourth proportional to 3,789, 5,228.78 and 2,110.31 is: 2,912.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,789 : 5,228.78 = 2,110.31 : x
  2. Step 2: Convert to fraction form
    3,789/5,228.78 = 2,110.31/x
  3. Step 3: Cross multiply
    3,789x = 5,228.78 × 2,110.31
  4. Step 4: Simplify right side
    3,789x = 11,034,346.72
  5. Step 5: Solve for x
    x = 11,034,346.72/3,789
  6. Step 6: Final answer
    x = 2,912.21

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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.