Home / 39,231.62-54,139.89-21,326.78

Finding the Fourth Proportional to 39,231.62, 54,139.89 and 21,326.78

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Solution

The fourth proportional to 39,231.62, 54,139.89 and 21,326.78 is: 29,431.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,231.62 : 54,139.89 = 21,326.78 : x
  2. Step 2: Convert to fraction form
    39,231.62/54,139.89 = 21,326.78/x
  3. Step 3: Cross multiply
    39,231.62x = 54,139.89 × 21,326.78
  4. Step 4: Simplify right side
    39,231.62x = 1,154,629,523.25
  5. Step 5: Solve for x
    x = 1,154,629,523.25/39,231.62
  6. Step 6: Final answer
    x = 29,431.09

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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.