Home / 20,859.91-31,289.83-8,379.93

Finding the Fourth Proportional to 20,859.91, 31,289.83 and 8,379.93

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Solution

The fourth proportional to 20,859.91, 31,289.83 and 8,379.93 is: 12,569.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,859.91 : 31,289.83 = 8,379.93 : x
  2. Step 2: Convert to fraction form
    20,859.91/31,289.83 = 8,379.93/x
  3. Step 3: Cross multiply
    20,859.91x = 31,289.83 × 8,379.93
  4. Step 4: Simplify right side
    20,859.91x = 262,206,585.11
  5. Step 5: Solve for x
    x = 262,206,585.11/20,859.91
  6. Step 6: Final answer
    x = 12,569.88

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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.