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Finding the Fourth Proportional to 11,861.85, 17,795.69 and 8,358.69

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Solution

The fourth proportional to 11,861.85, 17,795.69 and 8,358.69 is: 12,540.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,861.85 : 17,795.69 = 8,358.69 : x
  2. Step 2: Convert to fraction form
    11,861.85/17,795.69 = 8,358.69/x
  3. Step 3: Cross multiply
    11,861.85x = 17,795.69 × 8,358.69
  4. Step 4: Simplify right side
    11,861.85x = 148,748,614.25
  5. Step 5: Solve for x
    x = 148,748,614.25/11,861.85
  6. Step 6: Final answer
    x = 12,540.09

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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.