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Finding the Fourth Proportional to 34,687.71, 51,981.35 and 18,879.35

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Solution

The fourth proportional to 34,687.71, 51,981.35 and 18,879.35 is: 28,291.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,687.71 : 51,981.35 = 18,879.35 : x
  2. Step 2: Convert to fraction form
    34,687.71/51,981.35 = 18,879.35/x
  3. Step 3: Cross multiply
    34,687.71x = 51,981.35 × 18,879.35
  4. Step 4: Simplify right side
    34,687.71x = 981,373,745.82
  5. Step 5: Solve for x
    x = 981,373,745.82/34,687.71
  6. Step 6: Final answer
    x = 28,291.68

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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.