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Finding the Fourth Proportional to 8,453.92, 12,680.88 and 3,772.72

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Solution

The fourth proportional to 8,453.92, 12,680.88 and 3,772.72 is: 5,659.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,453.92 : 12,680.88 = 3,772.72 : x
  2. Step 2: Convert to fraction form
    8,453.92/12,680.88 = 3,772.72/x
  3. Step 3: Cross multiply
    8,453.92x = 12,680.88 × 3,772.72
  4. Step 4: Simplify right side
    8,453.92x = 47,841,409.59
  5. Step 5: Solve for x
    x = 47,841,409.59/8,453.92
  6. Step 6: Final answer
    x = 5,659.08

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Double scale
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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.