Home / 20,792.11-31,188.32-8,313.19

Finding the Fourth Proportional to 20,792.11, 31,188.32 and 8,313.19

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Solution

The fourth proportional to 20,792.11, 31,188.32 and 8,313.19 is: 12,469.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,792.11 : 31,188.32 = 8,313.19 : x
  2. Step 2: Convert to fraction form
    20,792.11/31,188.32 = 8,313.19/x
  3. Step 3: Cross multiply
    20,792.11x = 31,188.32 × 8,313.19
  4. Step 4: Simplify right side
    20,792.11x = 259,274,429.94
  5. Step 5: Solve for x
    x = 259,274,429.94/20,792.11
  6. Step 6: Final answer
    x = 12,469.85

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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.