Home / 12,912.08-19,371.32-3,678

Finding the Fourth Proportional to 12,912.08, 19,371.32 and 3,678

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Solution

The fourth proportional to 12,912.08, 19,371.32 and 3,678 is: 5,517.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,912.08 : 19,371.32 = 3,678 : x
  2. Step 2: Convert to fraction form
    12,912.08/19,371.32 = 3,678/x
  3. Step 3: Cross multiply
    12,912.08x = 19,371.32 × 3,678
  4. Step 4: Simplify right side
    12,912.08x = 71,247,714.96
  5. Step 5: Solve for x
    x = 71,247,714.96/12,912.08
  6. Step 6: Final answer
    x = 5,517.91

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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.