Home / 21,353.66-31,997.69-8,198.86

Finding the Fourth Proportional to 21,353.66, 31,997.69 and 8,198.86

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Solution

The fourth proportional to 21,353.66, 31,997.69 and 8,198.86 is: 12,285.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,353.66 : 31,997.69 = 8,198.86 : x
  2. Step 2: Convert to fraction form
    21,353.66/31,997.69 = 8,198.86/x
  3. Step 3: Cross multiply
    21,353.66x = 31,997.69 × 8,198.86
  4. Step 4: Simplify right side
    21,353.66x = 262,344,511.15
  5. Step 5: Solve for x
    x = 262,344,511.15/21,353.66
  6. Step 6: Final answer
    x = 12,285.69

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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.