Home / 20,891.24-31,329.56-8,408.03

Finding the Fourth Proportional to 20,891.24, 31,329.56 and 8,408.03

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Solution

The fourth proportional to 20,891.24, 31,329.56 and 8,408.03 is: 12,609.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,891.24 : 31,329.56 = 8,408.03 : x
  2. Step 2: Convert to fraction form
    20,891.24/31,329.56 = 8,408.03/x
  3. Step 3: Cross multiply
    20,891.24x = 31,329.56 × 8,408.03
  4. Step 4: Simplify right side
    20,891.24x = 263,419,880.37
  5. Step 5: Solve for x
    x = 263,419,880.37/20,891.24
  6. Step 6: Final answer
    x = 12,609.11

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1.5x scale

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.