Home / 20,993.92-31,529.76-16,639.36

Finding the Fourth Proportional to 20,993.92, 31,529.76 and 16,639.36

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Solution

The fourth proportional to 20,993.92, 31,529.76 and 16,639.36 is: 24,989.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,993.92 : 31,529.76 = 16,639.36 : x
  2. Step 2: Convert to fraction form
    20,993.92/31,529.76 = 16,639.36/x
  3. Step 3: Cross multiply
    20,993.92x = 31,529.76 × 16,639.36
  4. Step 4: Simplify right side
    20,993.92x = 524,635,027.35
  5. Step 5: Solve for x
    x = 524,635,027.35/20,993.92
  6. Step 6: Final answer
    x = 24,989.86

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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.