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Finding the Fourth Proportional to 8,119.78, 11,205.24 and 4,393.78

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Solution

The fourth proportional to 8,119.78, 11,205.24 and 4,393.78 is: 6,063.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,119.78 : 11,205.24 = 4,393.78 : x
  2. Step 2: Convert to fraction form
    8,119.78/11,205.24 = 4,393.78/x
  3. Step 3: Cross multiply
    8,119.78x = 11,205.24 × 4,393.78
  4. Step 4: Simplify right side
    8,119.78x = 49,233,359.41
  5. Step 5: Solve for x
    x = 49,233,359.41/8,119.78
  6. Step 6: Final answer
    x = 6,063.39

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Half scale
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Double scale
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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.