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Finding the Fourth Proportional to 20,625.76, 30,934.72 and 5,831.11

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Solution

The fourth proportional to 20,625.76, 30,934.72 and 5,831.11 is: 8,745.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,625.76 : 30,934.72 = 5,831.11 : x
  2. Step 2: Convert to fraction form
    20,625.76/30,934.72 = 5,831.11/x
  3. Step 3: Cross multiply
    20,625.76x = 30,934.72 × 5,831.11
  4. Step 4: Simplify right side
    20,625.76x = 180,383,755.14
  5. Step 5: Solve for x
    x = 180,383,755.14/20,625.76
  6. Step 6: Final answer
    x = 8,745.56

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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.