Home / 40,121.66-55,367.49-21,724.68

Finding the Fourth Proportional to 40,121.66, 55,367.49 and 21,724.68

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Solution

The fourth proportional to 40,121.66, 55,367.49 and 21,724.68 is: 29,979.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,121.66 : 55,367.49 = 21,724.68 : x
  2. Step 2: Convert to fraction form
    40,121.66/55,367.49 = 21,724.68/x
  3. Step 3: Cross multiply
    40,121.66x = 55,367.49 × 21,724.68
  4. Step 4: Simplify right side
    40,121.66x = 1,202,840,617.19
  5. Step 5: Solve for x
    x = 1,202,840,617.19/40,121.66
  6. Step 6: Final answer
    x = 29,979.84

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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.