Home / 20,906.60-28,847.38-11,831.91

Finding the Fourth Proportional to 20,906.60, 28,847.38 and 11,831.91

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Solution

The fourth proportional to 20,906.60, 28,847.38 and 11,831.91 is: 16,325.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,906.60 : 28,847.38 = 11,831.91 : x
  2. Step 2: Convert to fraction form
    20,906.60/28,847.38 = 11,831.91/x
  3. Step 3: Cross multiply
    20,906.60x = 28,847.38 × 11,831.91
  4. Step 4: Simplify right side
    20,906.60x = 341,319,646.43
  5. Step 5: Solve for x
    x = 341,319,646.43/20,906.60
  6. Step 6: Final answer
    x = 16,325.93

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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.