Home / 20,604.36-30,905.10-11,811.72

Finding the Fourth Proportional to 20,604.36, 30,905.10 and 11,811.72

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Solution

The fourth proportional to 20,604.36, 30,905.10 and 11,811.72 is: 17,716.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,604.36 : 30,905.10 = 11,811.72 : x
  2. Step 2: Convert to fraction form
    20,604.36/30,905.10 = 11,811.72/x
  3. Step 3: Cross multiply
    20,604.36x = 30,905.10 × 11,811.72
  4. Step 4: Simplify right side
    20,604.36x = 365,042,387.77
  5. Step 5: Solve for x
    x = 365,042,387.77/20,604.36
  6. Step 6: Final answer
    x = 17,716.75

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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.