Home / 20,790.08-31,163.34-9,687.61

Finding the Fourth Proportional to 20,790.08, 31,163.34 and 9,687.61

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Solution

The fourth proportional to 20,790.08, 31,163.34 and 9,687.61 is: 14,521.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.08 : 31,163.34 = 9,687.61 : x
  2. Step 2: Convert to fraction form
    20,790.08/31,163.34 = 9,687.61/x
  3. Step 3: Cross multiply
    20,790.08x = 31,163.34 × 9,687.61
  4. Step 4: Simplify right side
    20,790.08x = 301,898,284.22
  5. Step 5: Solve for x
    x = 301,898,284.22/20,790.08
  6. Step 6: Final answer
    x = 14,521.27

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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.