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Finding the Fourth Proportional to 12,687.48, 19,031.46 and 3,453.48

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Solution

The fourth proportional to 12,687.48, 19,031.46 and 3,453.48 is: 5,180.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,687.48 : 19,031.46 = 3,453.48 : x
  2. Step 2: Convert to fraction form
    12,687.48/19,031.46 = 3,453.48/x
  3. Step 3: Cross multiply
    12,687.48x = 19,031.46 × 3,453.48
  4. Step 4: Simplify right side
    12,687.48x = 65,724,766.48
  5. Step 5: Solve for x
    x = 65,724,766.48/12,687.48
  6. Step 6: Final answer
    x = 5,180.29

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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.