Home / 20,910.72-31,367.04-6,120.92

Finding the Fourth Proportional to 20,910.72, 31,367.04 and 6,120.92

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Solution

The fourth proportional to 20,910.72, 31,367.04 and 6,120.92 is: 9,181.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,910.72 : 31,367.04 = 6,120.92 : x
  2. Step 2: Convert to fraction form
    20,910.72/31,367.04 = 6,120.92/x
  3. Step 3: Cross multiply
    20,910.72x = 31,367.04 × 6,120.92
  4. Step 4: Simplify right side
    20,910.72x = 191,995,142.48
  5. Step 5: Solve for x
    x = 191,995,142.48/20,910.72
  6. Step 6: Final answer
    x = 9,181.66

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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.