Home / 21,229.32-31,831.76-8,757.92

Finding the Fourth Proportional to 21,229.32, 31,831.76 and 8,757.92

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Solution

The fourth proportional to 21,229.32, 31,831.76 and 8,757.92 is: 13,131.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,229.32 : 31,831.76 = 8,757.92 : x
  2. Step 2: Convert to fraction form
    21,229.32/31,831.76 = 8,757.92/x
  3. Step 3: Cross multiply
    21,229.32x = 31,831.76 × 8,757.92
  4. Step 4: Simplify right side
    21,229.32x = 278,780,007.54
  5. Step 5: Solve for x
    x = 278,780,007.54/21,229.32
  6. Step 6: Final answer
    x = 13,131.84

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1.5x scale

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.