Home / 39,821.94-54,954.18-21,917.16

Finding the Fourth Proportional to 39,821.94, 54,954.18 and 21,917.16

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Solution

The fourth proportional to 39,821.94, 54,954.18 and 21,917.16 is: 30,245.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,821.94 : 54,954.18 = 21,917.16 : x
  2. Step 2: Convert to fraction form
    39,821.94/54,954.18 = 21,917.16/x
  3. Step 3: Cross multiply
    39,821.94x = 54,954.18 × 21,917.16
  4. Step 4: Simplify right side
    39,821.94x = 1,204,439,555.73
  5. Step 5: Solve for x
    x = 1,204,439,555.73/39,821.94
  6. Step 6: Final answer
    x = 30,245.63

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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.