Home / 20,731.06-31,101.01-6,691.88

Finding the Fourth Proportional to 20,731.06, 31,101.01 and 6,691.88

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Solution

The fourth proportional to 20,731.06, 31,101.01 and 6,691.88 is: 10,039.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.06 : 31,101.01 = 6,691.88 : x
  2. Step 2: Convert to fraction form
    20,731.06/31,101.01 = 6,691.88/x
  3. Step 3: Cross multiply
    20,731.06x = 31,101.01 × 6,691.88
  4. Step 4: Simplify right side
    20,731.06x = 208,124,226.80
  5. Step 5: Solve for x
    x = 208,124,226.80/20,731.06
  6. Step 6: Final answer
    x = 10,039.25

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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.