Home / 20,831.64-28,744.24-11,879.32

Finding the Fourth Proportional to 20,831.64, 28,744.24 and 11,879.32

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Solution

The fourth proportional to 20,831.64, 28,744.24 and 11,879.32 is: 16,391.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.64 : 28,744.24 = 11,879.32 : x
  2. Step 2: Convert to fraction form
    20,831.64/28,744.24 = 11,879.32/x
  3. Step 3: Cross multiply
    20,831.64x = 28,744.24 × 11,879.32
  4. Step 4: Simplify right side
    20,831.64x = 341,462,025.12
  5. Step 5: Solve for x
    x = 341,462,025.12/20,831.64
  6. Step 6: Final answer
    x = 16,391.51

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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.