Home / 3,131.08-4,696.90-1,831.80

Finding the Fourth Proportional to 3,131.08, 4,696.90 and 1,831.80

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Solution

The fourth proportional to 3,131.08, 4,696.90 and 1,831.80 is: 2,747.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.08 : 4,696.90 = 1,831.80 : x
  2. Step 2: Convert to fraction form
    3,131.08/4,696.90 = 1,831.80/x
  3. Step 3: Cross multiply
    3,131.08x = 4,696.90 × 1,831.80
  4. Step 4: Simplify right side
    3,131.08x = 8,603,781.42
  5. Step 5: Solve for x
    x = 8,603,781.42/3,131.08
  6. Step 6: Final answer
    x = 2,747.86

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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.