Home / 20,831.21-28,748.33-11,880.44

Finding the Fourth Proportional to 20,831.21, 28,748.33 and 11,880.44

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Solution

The fourth proportional to 20,831.21, 28,748.33 and 11,880.44 is: 16,395.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.21 : 28,748.33 = 11,880.44 : x
  2. Step 2: Convert to fraction form
    20,831.21/28,748.33 = 11,880.44/x
  3. Step 3: Cross multiply
    20,831.21x = 28,748.33 × 11,880.44
  4. Step 4: Simplify right side
    20,831.21x = 341,542,695.62
  5. Step 5: Solve for x
    x = 341,542,695.62/20,831.21
  6. Step 6: Final answer
    x = 16,395.72

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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.