Home / 39,138.12-54,010.62-21,233.12

Finding the Fourth Proportional to 39,138.12, 54,010.62 and 21,233.12

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Solution

The fourth proportional to 39,138.12, 54,010.62 and 21,233.12 is: 29,301.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,138.12 : 54,010.62 = 21,233.12 : x
  2. Step 2: Convert to fraction form
    39,138.12/54,010.62 = 21,233.12/x
  3. Step 3: Cross multiply
    39,138.12x = 54,010.62 × 21,233.12
  4. Step 4: Simplify right side
    39,138.12x = 1,146,813,975.73
  5. Step 5: Solve for x
    x = 1,146,813,975.73/39,138.12
  6. Step 6: Final answer
    x = 29,301.71

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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.