Home / 20,738.82-28,610.31-12,778.14

Finding the Fourth Proportional to 20,738.82, 28,610.31 and 12,778.14

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Solution

The fourth proportional to 20,738.82, 28,610.31 and 12,778.14 is: 17,628.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,738.82 : 28,610.31 = 12,778.14 : x
  2. Step 2: Convert to fraction form
    20,738.82/28,610.31 = 12,778.14/x
  3. Step 3: Cross multiply
    20,738.82x = 28,610.31 × 12,778.14
  4. Step 4: Simplify right side
    20,738.82x = 365,586,546.62
  5. Step 5: Solve for x
    x = 365,586,546.62/20,738.82
  6. Step 6: Final answer
    x = 17,628.13

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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.