Home / 28,481.36-42,713.96-11,820.78

Finding the Fourth Proportional to 28,481.36, 42,713.96 and 11,820.78

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Solution

The fourth proportional to 28,481.36, 42,713.96 and 11,820.78 is: 17,727.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,481.36 : 42,713.96 = 11,820.78 : x
  2. Step 2: Convert to fraction form
    28,481.36/42,713.96 = 11,820.78/x
  3. Step 3: Cross multiply
    28,481.36x = 42,713.96 × 11,820.78
  4. Step 4: Simplify right side
    28,481.36x = 504,912,324.09
  5. Step 5: Solve for x
    x = 504,912,324.09/28,481.36
  6. Step 6: Final answer
    x = 17,727.82

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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.