Home / 20,615.82-30,917.60-10,749.71

Finding the Fourth Proportional to 20,615.82, 30,917.60 and 10,749.71

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Solution

The fourth proportional to 20,615.82, 30,917.60 and 10,749.71 is: 16,121.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.82 : 30,917.60 = 10,749.71 : x
  2. Step 2: Convert to fraction form
    20,615.82/30,917.60 = 10,749.71/x
  3. Step 3: Cross multiply
    20,615.82x = 30,917.60 × 10,749.71
  4. Step 4: Simplify right side
    20,615.82x = 332,355,297.75
  5. Step 5: Solve for x
    x = 332,355,297.75/20,615.82
  6. Step 6: Final answer
    x = 16,121.37

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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.