Home / 20,833.05-31,252.82-6,978.81

Finding the Fourth Proportional to 20,833.05, 31,252.82 and 6,978.81

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Solution

The fourth proportional to 20,833.05, 31,252.82 and 6,978.81 is: 10,469.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,833.05 : 31,252.82 = 6,978.81 : x
  2. Step 2: Convert to fraction form
    20,833.05/31,252.82 = 6,978.81/x
  3. Step 3: Cross multiply
    20,833.05x = 31,252.82 × 6,978.81
  4. Step 4: Simplify right side
    20,833.05x = 218,107,457.85
  5. Step 5: Solve for x
    x = 218,107,457.85/20,833.05
  6. Step 6: Final answer
    x = 10,469.30

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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.