Home / 20,930.16-31,382.94-8,450.60

Finding the Fourth Proportional to 20,930.16, 31,382.94 and 8,450.60

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Solution

The fourth proportional to 20,930.16, 31,382.94 and 8,450.60 is: 12,670.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.16 : 31,382.94 = 8,450.60 : x
  2. Step 2: Convert to fraction form
    20,930.16/31,382.94 = 8,450.60/x
  3. Step 3: Cross multiply
    20,930.16x = 31,382.94 × 8,450.60
  4. Step 4: Simplify right side
    20,930.16x = 265,204,515.85
  5. Step 5: Solve for x
    x = 265,204,515.85/20,930.16
  6. Step 6: Final answer
    x = 12,670.93

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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.