Home / 31,163.94-46,768.32-21,143.75

Finding the Fourth Proportional to 31,163.94, 46,768.32 and 21,143.75

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Solution

The fourth proportional to 31,163.94, 46,768.32 and 21,143.75 is: 31,730.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,163.94 : 46,768.32 = 21,143.75 : x
  2. Step 2: Convert to fraction form
    31,163.94/46,768.32 = 21,143.75/x
  3. Step 3: Cross multiply
    31,163.94x = 46,768.32 × 21,143.75
  4. Step 4: Simplify right side
    31,163.94x = 988,857,432.16
  5. Step 5: Solve for x
    x = 988,857,432.16/31,163.94
  6. Step 6: Final answer
    x = 31,730.82

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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.