Home / 39,789.69-54,910.05-21,640.41

Finding the Fourth Proportional to 39,789.69, 54,910.05 and 21,640.41

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Solution

The fourth proportional to 39,789.69, 54,910.05 and 21,640.41 is: 29,863.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,789.69 : 54,910.05 = 21,640.41 : x
  2. Step 2: Convert to fraction form
    39,789.69/54,910.05 = 21,640.41/x
  3. Step 3: Cross multiply
    39,789.69x = 54,910.05 × 21,640.41
  4. Step 4: Simplify right side
    39,789.69x = 1,188,275,995.12
  5. Step 5: Solve for x
    x = 1,188,275,995.12/39,789.69
  6. Step 6: Final answer
    x = 29,863.92

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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.