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Finding the Fourth Proportional to 8,331.78, 12,483.06 and 7,427.82

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Solution

The fourth proportional to 8,331.78, 12,483.06 and 7,427.82 is: 11,128.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,331.78 : 12,483.06 = 7,427.82 : x
  2. Step 2: Convert to fraction form
    8,331.78/12,483.06 = 7,427.82/x
  3. Step 3: Cross multiply
    8,331.78x = 12,483.06 × 7,427.82
  4. Step 4: Simplify right side
    8,331.78x = 92,721,922.73
  5. Step 5: Solve for x
    x = 92,721,922.73/8,331.78
  6. Step 6: Final answer
    x = 11,128.71

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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.