Home / 20,664.38-30,998.61-6,620.87

Finding the Fourth Proportional to 20,664.38, 30,998.61 and 6,620.87

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Solution

The fourth proportional to 20,664.38, 30,998.61 and 6,620.87 is: 9,931.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,664.38 : 30,998.61 = 6,620.87 : x
  2. Step 2: Convert to fraction form
    20,664.38/30,998.61 = 6,620.87/x
  3. Step 3: Cross multiply
    20,664.38x = 30,998.61 × 6,620.87
  4. Step 4: Simplify right side
    20,664.38x = 205,237,844.49
  5. Step 5: Solve for x
    x = 205,237,844.49/20,664.38
  6. Step 6: Final answer
    x = 9,931.96

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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.