Home / 20,481.69-28,265.64-11,529.78

Finding the Fourth Proportional to 20,481.69, 28,265.64 and 11,529.78

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Solution

The fourth proportional to 20,481.69, 28,265.64 and 11,529.78 is: 15,911.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,481.69 : 28,265.64 = 11,529.78 : x
  2. Step 2: Convert to fraction form
    20,481.69/28,265.64 = 11,529.78/x
  3. Step 3: Cross multiply
    20,481.69x = 28,265.64 × 11,529.78
  4. Step 4: Simplify right side
    20,481.69x = 325,896,610.76
  5. Step 5: Solve for x
    x = 325,896,610.76/20,481.69
  6. Step 6: Final answer
    x = 15,911.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.