Home / 20,682.81-31,023.41-5,100.03

Finding the Fourth Proportional to 20,682.81, 31,023.41 and 5,100.03

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Solution

The fourth proportional to 20,682.81, 31,023.41 and 5,100.03 is: 7,649.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,682.81 : 31,023.41 = 5,100.03 : x
  2. Step 2: Convert to fraction form
    20,682.81/31,023.41 = 5,100.03/x
  3. Step 3: Cross multiply
    20,682.81x = 31,023.41 × 5,100.03
  4. Step 4: Simplify right side
    20,682.81x = 158,220,296.20
  5. Step 5: Solve for x
    x = 158,220,296.20/20,682.81
  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.