Home / 20,935.20-31,405.94-6,142.37

Finding the Fourth Proportional to 20,935.20, 31,405.94 and 6,142.37

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Solution

The fourth proportional to 20,935.20, 31,405.94 and 6,142.37 is: 9,214.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,935.20 : 31,405.94 = 6,142.37 : x
  2. Step 2: Convert to fraction form
    20,935.20/31,405.94 = 6,142.37/x
  3. Step 3: Cross multiply
    20,935.20x = 31,405.94 × 6,142.37
  4. Step 4: Simplify right side
    20,935.20x = 192,906,872.97
  5. Step 5: Solve for x
    x = 192,906,872.97/20,935.20
  6. Step 6: Final answer
    x = 9,214.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.