Home / 20,660.24-30,994.35-8,813.81

Finding the Fourth Proportional to 20,660.24, 30,994.35 and 8,813.81

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Solution

The fourth proportional to 20,660.24, 30,994.35 and 8,813.81 is: 13,222.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.24 : 30,994.35 = 8,813.81 : x
  2. Step 2: Convert to fraction form
    20,660.24/30,994.35 = 8,813.81/x
  3. Step 3: Cross multiply
    20,660.24x = 30,994.35 × 8,813.81
  4. Step 4: Simplify right side
    20,660.24x = 273,178,311.97
  5. Step 5: Solve for x
    x = 273,178,311.97/20,660.24
  6. Step 6: Final answer
    x = 13,222.42

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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.