Home / 39,789.71-54,909.78-21,885.92

Finding the Fourth Proportional to 39,789.71, 54,909.78 and 21,885.92

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Solution

The fourth proportional to 39,789.71, 54,909.78 and 21,885.92 is: 30,202.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,789.71 : 54,909.78 = 21,885.92 : x
  2. Step 2: Convert to fraction form
    39,789.71/54,909.78 = 21,885.92/x
  3. Step 3: Cross multiply
    39,789.71x = 54,909.78 × 21,885.92
  4. Step 4: Simplify right side
    39,789.71x = 1,201,751,052.30
  5. Step 5: Solve for x
    x = 1,201,751,052.30/39,789.71
  6. Step 6: Final answer
    x = 30,202.56

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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.