Home / 11,975.23-16,520.62-8,390.85

Finding the Fourth Proportional to 11,975.23, 16,520.62 and 8,390.85

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Solution

The fourth proportional to 11,975.23, 16,520.62 and 8,390.85 is: 11,575.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,975.23 : 16,520.62 = 8,390.85 : x
  2. Step 2: Convert to fraction form
    11,975.23/16,520.62 = 8,390.85/x
  3. Step 3: Cross multiply
    11,975.23x = 16,520.62 × 8,390.85
  4. Step 4: Simplify right side
    11,975.23x = 138,622,044.33
  5. Step 5: Solve for x
    x = 138,622,044.33/11,975.23
  6. Step 6: Final answer
    x = 11,575.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.