Home / 20,682.28-31,023.66-5,099.86

Finding the Fourth Proportional to 20,682.28, 31,023.66 and 5,099.86

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Solution

The fourth proportional to 20,682.28, 31,023.66 and 5,099.86 is: 7,649.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,682.28 : 31,023.66 = 5,099.86 : x
  2. Step 2: Convert to fraction form
    20,682.28/31,023.66 = 5,099.86/x
  3. Step 3: Cross multiply
    20,682.28x = 31,023.66 × 5,099.86
  4. Step 4: Simplify right side
    20,682.28x = 158,216,322.69
  5. Step 5: Solve for x
    x = 158,216,322.69/20,682.28
  6. Step 6: Final answer
    x = 7,649.85

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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.