Home / 20,900.94-31,350.56-5,318.96

Finding the Fourth Proportional to 20,900.94, 31,350.56 and 5,318.96

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Solution

The fourth proportional to 20,900.94, 31,350.56 and 5,318.96 is: 7,978.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,900.94 : 31,350.56 = 5,318.96 : x
  2. Step 2: Convert to fraction form
    20,900.94/31,350.56 = 5,318.96/x
  3. Step 3: Cross multiply
    20,900.94x = 31,350.56 × 5,318.96
  4. Step 4: Simplify right side
    20,900.94x = 166,752,374.62
  5. Step 5: Solve for x
    x = 166,752,374.62/20,900.94
  6. Step 6: Final answer
    x = 7,978.22

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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.