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Finding the Fourth Proportional to 8,467, 11,684.46 and 5,155

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Solution

The fourth proportional to 8,467, 11,684.46 and 5,155 is: 7,113.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,467 : 11,684.46 = 5,155 : x
  2. Step 2: Convert to fraction form
    8,467/11,684.46 = 5,155/x
  3. Step 3: Cross multiply
    8,467x = 11,684.46 × 5,155
  4. Step 4: Simplify right side
    8,467x = 60,233,391.30
  5. Step 5: Solve for x
    x = 60,233,391.30/8,467
  6. Step 6: Final answer
    x = 7,113.90

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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.