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Finding the Fourth Proportional to 8,238.76, 11,369.78 and 4,512.76

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Solution

The fourth proportional to 8,238.76, 11,369.78 and 4,512.76 is: 6,227.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,238.76 : 11,369.78 = 4,512.76 : x
  2. Step 2: Convert to fraction form
    8,238.76/11,369.78 = 4,512.76/x
  3. Step 3: Cross multiply
    8,238.76x = 11,369.78 × 4,512.76
  4. Step 4: Simplify right side
    8,238.76x = 51,309,088.39
  5. Step 5: Solve for x
    x = 51,309,088.39/8,238.76
  6. Step 6: Final answer
    x = 6,227.77

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.