Home / 20,999.82-31,499.49-8,516.88

Finding the Fourth Proportional to 20,999.82, 31,499.49 and 8,516.88

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Solution

The fourth proportional to 20,999.82, 31,499.49 and 8,516.88 is: 12,775.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,999.82 : 31,499.49 = 8,516.88 : x
  2. Step 2: Convert to fraction form
    20,999.82/31,499.49 = 8,516.88/x
  3. Step 3: Cross multiply
    20,999.82x = 31,499.49 × 8,516.88
  4. Step 4: Simplify right side
    20,999.82x = 268,277,376.39
  5. Step 5: Solve for x
    x = 268,277,376.39/20,999.82
  6. Step 6: Final answer
    x = 12,775.22

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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.