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Finding the Fourth Proportional to 12,672.59, 19,026.11 and 7,129.82

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Solution

The fourth proportional to 12,672.59, 19,026.11 and 7,129.82 is: 10,704.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,672.59 : 19,026.11 = 7,129.82 : x
  2. Step 2: Convert to fraction form
    12,672.59/19,026.11 = 7,129.82/x
  3. Step 3: Cross multiply
    12,672.59x = 19,026.11 × 7,129.82
  4. Step 4: Simplify right side
    12,672.59x = 135,652,804.99
  5. Step 5: Solve for x
    x = 135,652,804.99/12,672.59
  6. Step 6: Final answer
    x = 10,704.43

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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.