Home / 20,744.28-31,116.38-5,161.91

Finding the Fourth Proportional to 20,744.28, 31,116.38 and 5,161.91

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Solution

The fourth proportional to 20,744.28, 31,116.38 and 5,161.91 is: 7,742.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,744.28 : 31,116.38 = 5,161.91 : x
  2. Step 2: Convert to fraction form
    20,744.28/31,116.38 = 5,161.91/x
  3. Step 3: Cross multiply
    20,744.28x = 31,116.38 × 5,161.91
  4. Step 4: Simplify right side
    20,744.28x = 160,619,771.69
  5. Step 5: Solve for x
    x = 160,619,771.69/20,744.28
  6. Step 6: Final answer
    x = 7,742.85

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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.