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Finding the Fourth Proportional to 13,347, 18,418.86 and 8,379

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Solution

The fourth proportional to 13,347, 18,418.86 and 8,379 is: 11,563.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,347 : 18,418.86 = 8,379 : x
  2. Step 2: Convert to fraction form
    13,347/18,418.86 = 8,379/x
  3. Step 3: Cross multiply
    13,347x = 18,418.86 × 8,379
  4. Step 4: Simplify right side
    13,347x = 154,331,627.94
  5. Step 5: Solve for x
    x = 154,331,627.94/13,347
  6. Step 6: Final answer
    x = 11,563.02

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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.