Home / 20,999.96-31,489.67-9,163.73

Finding the Fourth Proportional to 20,999.96, 31,489.67 and 9,163.73

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Solution

The fourth proportional to 20,999.96, 31,489.67 and 9,163.73 is: 13,741.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,999.96 : 31,489.67 = 9,163.73 : x
  2. Step 2: Convert to fraction form
    20,999.96/31,489.67 = 9,163.73/x
  3. Step 3: Cross multiply
    20,999.96x = 31,489.67 × 9,163.73
  4. Step 4: Simplify right side
    20,999.96x = 288,562,833.67
  5. Step 5: Solve for x
    x = 288,562,833.67/20,999.96
  6. Step 6: Final answer
    x = 13,741.11

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1.5x scale

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.