Home / 20,911.59-31,373.54-11,057.79

Finding the Fourth Proportional to 20,911.59, 31,373.54 and 11,057.79

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Solution

The fourth proportional to 20,911.59, 31,373.54 and 11,057.79 is: 16,589.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.59 : 31,373.54 = 11,057.79 : x
  2. Step 2: Convert to fraction form
    20,911.59/31,373.54 = 11,057.79/x
  3. Step 3: Cross multiply
    20,911.59x = 31,373.54 × 11,057.79
  4. Step 4: Simplify right side
    20,911.59x = 346,922,016.88
  5. Step 5: Solve for x
    x = 346,922,016.88/20,911.59
  6. Step 6: Final answer
    x = 16,589.94

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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.