Home / 39,138.05-54,010.22-21,910.43

Finding the Fourth Proportional to 39,138.05, 54,010.22 and 21,910.43

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Solution

The fourth proportional to 39,138.05, 54,010.22 and 21,910.43 is: 30,236.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,138.05 : 54,010.22 = 21,910.43 : x
  2. Step 2: Convert to fraction form
    39,138.05/54,010.22 = 21,910.43/x
  3. Step 3: Cross multiply
    39,138.05x = 54,010.22 × 21,910.43
  4. Step 4: Simplify right side
    39,138.05x = 1,183,387,170.07
  5. Step 5: Solve for x
    x = 1,183,387,170.07/39,138.05
  6. Step 6: Final answer
    x = 30,236.23

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1.5x scale

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.