Home / 20,286.82-30,430.22-8,440.36

Finding the Fourth Proportional to 20,286.82, 30,430.22 and 8,440.36

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Solution

The fourth proportional to 20,286.82, 30,430.22 and 8,440.36 is: 12,660.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,286.82 : 30,430.22 = 8,440.36 : x
  2. Step 2: Convert to fraction form
    20,286.82/30,430.22 = 8,440.36/x
  3. Step 3: Cross multiply
    20,286.82x = 30,430.22 × 8,440.36
  4. Step 4: Simplify right side
    20,286.82x = 256,842,011.68
  5. Step 5: Solve for x
    x = 256,842,011.68/20,286.82
  6. Step 6: Final answer
    x = 12,660.54

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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.