Home / 39,821.72-54,957.32-21,920.12

Finding the Fourth Proportional to 39,821.72, 54,957.32 and 21,920.12

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Solution

The fourth proportional to 39,821.72, 54,957.32 and 21,920.12 is: 30,251.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,821.72 : 54,957.32 = 21,920.12 : x
  2. Step 2: Convert to fraction form
    39,821.72/54,957.32 = 21,920.12/x
  3. Step 3: Cross multiply
    39,821.72x = 54,957.32 × 21,920.12
  4. Step 4: Simplify right side
    39,821.72x = 1,204,671,049.28
  5. Step 5: Solve for x
    x = 1,204,671,049.28/39,821.72
  6. Step 6: Final answer
    x = 30,251.61

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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.