Home / 20,481.21-30,721.82-5,690.14

Finding the Fourth Proportional to 20,481.21, 30,721.82 and 5,690.14

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Solution

The fourth proportional to 20,481.21, 30,721.82 and 5,690.14 is: 8,535.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,481.21 : 30,721.82 = 5,690.14 : x
  2. Step 2: Convert to fraction form
    20,481.21/30,721.82 = 5,690.14/x
  3. Step 3: Cross multiply
    20,481.21x = 30,721.82 × 5,690.14
  4. Step 4: Simplify right side
    20,481.21x = 174,811,351.60
  5. Step 5: Solve for x
    x = 174,811,351.60/20,481.21
  6. Step 6: Final answer
    x = 8,535.21

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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.