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Finding the Fourth Proportional to 15,438.70, 23,129.70 and 8,845.30

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Solution

The fourth proportional to 15,438.70, 23,129.70 and 8,845.30 is: 13,251.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,438.70 : 23,129.70 = 8,845.30 : x
  2. Step 2: Convert to fraction form
    15,438.70/23,129.70 = 8,845.30/x
  3. Step 3: Cross multiply
    15,438.70x = 23,129.70 × 8,845.30
  4. Step 4: Simplify right side
    15,438.70x = 204,589,135.41
  5. Step 5: Solve for x
    x = 204,589,135.41/15,438.70
  6. Step 6: Final answer
    x = 13,251.71

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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.