Home / 13,790.62-20,689.17-3,930.04

Finding the Fourth Proportional to 13,790.62, 20,689.17 and 3,930.04

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Solution

The fourth proportional to 13,790.62, 20,689.17 and 3,930.04 is: 5,895.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,790.62 : 20,689.17 = 3,930.04 : x
  2. Step 2: Convert to fraction form
    13,790.62/20,689.17 = 3,930.04/x
  3. Step 3: Cross multiply
    13,790.62x = 20,689.17 × 3,930.04
  4. Step 4: Simplify right side
    13,790.62x = 81,309,162.22
  5. Step 5: Solve for x
    x = 81,309,162.22/13,790.62
  6. Step 6: Final answer
    x = 5,895.98

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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.