Home / 20,880.92-31,313.59-8,396.73

Finding the Fourth Proportional to 20,880.92, 31,313.59 and 8,396.73

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Solution

The fourth proportional to 20,880.92, 31,313.59 and 8,396.73 is: 12,591.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,880.92 : 31,313.59 = 8,396.73 : x
  2. Step 2: Convert to fraction form
    20,880.92/31,313.59 = 8,396.73/x
  3. Step 3: Cross multiply
    20,880.92x = 31,313.59 × 8,396.73
  4. Step 4: Simplify right side
    20,880.92x = 262,931,739.57
  5. Step 5: Solve for x
    x = 262,931,739.57/20,880.92
  6. Step 6: Final answer
    x = 12,591.96

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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.