Home / 20,794.16-31,199-12,480.14

Finding the Fourth Proportional to 20,794.16, 31,199 and 12,480.14

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Solution

The fourth proportional to 20,794.16, 31,199 and 12,480.14 is: 18,724.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,794.16 : 31,199 = 12,480.14 : x
  2. Step 2: Convert to fraction form
    20,794.16/31,199 = 12,480.14/x
  3. Step 3: Cross multiply
    20,794.16x = 31,199 × 12,480.14
  4. Step 4: Simplify right side
    20,794.16x = 389,367,887.86
  5. Step 5: Solve for x
    x = 389,367,887.86/20,794.16
  6. Step 6: Final answer
    x = 18,724.87

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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.