Home / 12,843.20-19,280.40-8,163.20

Finding the Fourth Proportional to 12,843.20, 19,280.40 and 8,163.20

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Solution

The fourth proportional to 12,843.20, 19,280.40 and 8,163.20 is: 12,254.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,843.20 : 19,280.40 = 8,163.20 : x
  2. Step 2: Convert to fraction form
    12,843.20/19,280.40 = 8,163.20/x
  3. Step 3: Cross multiply
    12,843.20x = 19,280.40 × 8,163.20
  4. Step 4: Simplify right side
    12,843.20x = 157,389,761.28
  5. Step 5: Solve for x
    x = 157,389,761.28/12,843.20
  6. Step 6: Final answer
    x = 12,254.72

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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.