Home / 13,424.20-20,128.30-8,233.80

Finding the Fourth Proportional to 13,424.20, 20,128.30 and 8,233.80

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Solution

The fourth proportional to 13,424.20, 20,128.30 and 8,233.80 is: 12,345.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,424.20 : 20,128.30 = 8,233.80 : x
  2. Step 2: Convert to fraction form
    13,424.20/20,128.30 = 8,233.80/x
  3. Step 3: Cross multiply
    13,424.20x = 20,128.30 × 8,233.80
  4. Step 4: Simplify right side
    13,424.20x = 165,732,396.54
  5. Step 5: Solve for x
    x = 165,732,396.54/13,424.20
  6. Step 6: Final answer
    x = 12,345.79

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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.