Home / 19,921.92-29,872.64-12,039.36

Finding the Fourth Proportional to 19,921.92, 29,872.64 and 12,039.36

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Solution

The fourth proportional to 19,921.92, 29,872.64 and 12,039.36 is: 18,052.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,921.92 : 29,872.64 = 12,039.36 : x
  2. Step 2: Convert to fraction form
    19,921.92/29,872.64 = 12,039.36/x
  3. Step 3: Cross multiply
    19,921.92x = 29,872.64 × 12,039.36
  4. Step 4: Simplify right side
    19,921.92x = 359,647,467.11
  5. Step 5: Solve for x
    x = 359,647,467.11/19,921.92
  6. Step 6: Final answer
    x = 18,052.85

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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.