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Finding the Fourth Proportional to 12,469.13, 18,703.69 and 4,672.47

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Solution

The fourth proportional to 12,469.13, 18,703.69 and 4,672.47 is: 7,008.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,469.13 : 18,703.69 = 4,672.47 : x
  2. Step 2: Convert to fraction form
    12,469.13/18,703.69 = 4,672.47/x
  3. Step 3: Cross multiply
    12,469.13x = 18,703.69 × 4,672.47
  4. Step 4: Simplify right side
    12,469.13x = 87,392,418.73
  5. Step 5: Solve for x
    x = 87,392,418.73/12,469.13
  6. Step 6: Final answer
    x = 7,008.71

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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.