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Finding the Fourth Proportional to 12,339.92, 17,043.63 and 8,354.09

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Solution

The fourth proportional to 12,339.92, 17,043.63 and 8,354.09 is: 11,538.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,339.92 : 17,043.63 = 8,354.09 : x
  2. Step 2: Convert to fraction form
    12,339.92/17,043.63 = 8,354.09/x
  3. Step 3: Cross multiply
    12,339.92x = 17,043.63 × 8,354.09
  4. Step 4: Simplify right side
    12,339.92x = 142,384,018.95
  5. Step 5: Solve for x
    x = 142,384,018.95/12,339.92
  6. Step 6: Final answer
    x = 11,538.49

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.