Home / 20,727.72-31,096.20-7,579.80

Finding the Fourth Proportional to 20,727.72, 31,096.20 and 7,579.80

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Solution

The fourth proportional to 20,727.72, 31,096.20 and 7,579.80 is: 11,371.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,727.72 : 31,096.20 = 7,579.80 : x
  2. Step 2: Convert to fraction form
    20,727.72/31,096.20 = 7,579.80/x
  3. Step 3: Cross multiply
    20,727.72x = 31,096.20 × 7,579.80
  4. Step 4: Simplify right side
    20,727.72x = 235,702,976.76
  5. Step 5: Solve for x
    x = 235,702,976.76/20,727.72
  6. Step 6: Final answer
    x = 11,371.39

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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.