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Finding the Fourth Proportional to 8,940.73, 12,339.12 and 4,961.87

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Solution

The fourth proportional to 8,940.73, 12,339.12 and 4,961.87 is: 6,847.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,940.73 : 12,339.12 = 4,961.87 : x
  2. Step 2: Convert to fraction form
    8,940.73/12,339.12 = 4,961.87/x
  3. Step 3: Cross multiply
    8,940.73x = 12,339.12 × 4,961.87
  4. Step 4: Simplify right side
    8,940.73x = 61,225,109.35
  5. Step 5: Solve for x
    x = 61,225,109.35/8,940.73
  6. Step 6: Final answer
    x = 6,847.89

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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.