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Finding the Fourth Proportional to 28,736.75, 43,105.13 and 7,960.25

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Solution

The fourth proportional to 28,736.75, 43,105.13 and 7,960.25 is: 11,940.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,736.75 : 43,105.13 = 7,960.25 : x
  2. Step 2: Convert to fraction form
    28,736.75/43,105.13 = 7,960.25/x
  3. Step 3: Cross multiply
    28,736.75x = 43,105.13 × 7,960.25
  4. Step 4: Simplify right side
    28,736.75x = 343,127,611.08
  5. Step 5: Solve for x
    x = 343,127,611.08/28,736.75
  6. Step 6: Final answer
    x = 11,940.38

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Similar ratio
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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.