Home / 20,221.76-30,324.36-11,918.36

Finding the Fourth Proportional to 20,221.76, 30,324.36 and 11,918.36

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Solution

The fourth proportional to 20,221.76, 30,324.36 and 11,918.36 is: 17,872.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,221.76 : 30,324.36 = 11,918.36 : x
  2. Step 2: Convert to fraction form
    20,221.76/30,324.36 = 11,918.36/x
  3. Step 3: Cross multiply
    20,221.76x = 30,324.36 × 11,918.36
  4. Step 4: Simplify right side
    20,221.76x = 361,416,639.25
  5. Step 5: Solve for x
    x = 361,416,639.25/20,221.76
  6. Step 6: Final answer
    x = 17,872.66

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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.