Home / 39,782.97-54,901.92-21,879.36

Finding the Fourth Proportional to 39,782.97, 54,901.92 and 21,879.36

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Solution

The fourth proportional to 39,782.97, 54,901.92 and 21,879.36 is: 30,194.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,782.97 : 54,901.92 = 21,879.36 : x
  2. Step 2: Convert to fraction form
    39,782.97/54,901.92 = 21,879.36/x
  3. Step 3: Cross multiply
    39,782.97x = 54,901.92 × 21,879.36
  4. Step 4: Simplify right side
    39,782.97x = 1,201,218,872.37
  5. Step 5: Solve for x
    x = 1,201,218,872.37/39,782.97
  6. Step 6: Final answer
    x = 30,194.30

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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.