Home / 20,688.26-31,032.03-5,105.90

Finding the Fourth Proportional to 20,688.26, 31,032.03 and 5,105.90

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Solution

The fourth proportional to 20,688.26, 31,032.03 and 5,105.90 is: 7,658.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.26 : 31,032.03 = 5,105.90 : x
  2. Step 2: Convert to fraction form
    20,688.26/31,032.03 = 5,105.90/x
  3. Step 3: Cross multiply
    20,688.26x = 31,032.03 × 5,105.90
  4. Step 4: Simplify right side
    20,688.26x = 158,446,441.98
  5. Step 5: Solve for x
    x = 158,446,441.98/20,688.26
  6. Step 6: Final answer
    x = 7,658.76

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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.