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Finding the Fourth Proportional to 13,006.92, 19,512 and 4,239.48

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Solution

The fourth proportional to 13,006.92, 19,512 and 4,239.48 is: 6,359.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,006.92 : 19,512 = 4,239.48 : x
  2. Step 2: Convert to fraction form
    13,006.92/19,512 = 4,239.48/x
  3. Step 3: Cross multiply
    13,006.92x = 19,512 × 4,239.48
  4. Step 4: Simplify right side
    13,006.92x = 82,720,733.76
  5. Step 5: Solve for x
    x = 82,720,733.76/13,006.92
  6. Step 6: Final answer
    x = 6,359.75

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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.