Home / 20,789.08-31,161.84-9,686.61

Finding the Fourth Proportional to 20,789.08, 31,161.84 and 9,686.61

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Solution

The fourth proportional to 20,789.08, 31,161.84 and 9,686.61 is: 14,519.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789.08 : 31,161.84 = 9,686.61 : x
  2. Step 2: Convert to fraction form
    20,789.08/31,161.84 = 9,686.61/x
  3. Step 3: Cross multiply
    20,789.08x = 31,161.84 × 9,686.61
  4. Step 4: Simplify right side
    20,789.08x = 301,852,590.96
  5. Step 5: Solve for x
    x = 301,852,590.96/20,789.08
  6. Step 6: Final answer
    x = 14,519.77

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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.