Home / 39,795.72-54,917.70-21,891

Finding the Fourth Proportional to 39,795.72, 54,917.70 and 21,891

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Solution

The fourth proportional to 39,795.72, 54,917.70 and 21,891 is: 30,209.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,795.72 : 54,917.70 = 21,891 : x
  2. Step 2: Convert to fraction form
    39,795.72/54,917.70 = 21,891/x
  3. Step 3: Cross multiply
    39,795.72x = 54,917.70 × 21,891
  4. Step 4: Simplify right side
    39,795.72x = 1,202,203,370.70
  5. Step 5: Solve for x
    x = 1,202,203,370.70/39,795.72
  6. Step 6: Final answer
    x = 30,209.36

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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.