Home / 31,850.21-47,775.74-12,129.86

Finding the Fourth Proportional to 31,850.21, 47,775.74 and 12,129.86

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Solution

The fourth proportional to 31,850.21, 47,775.74 and 12,129.86 is: 18,194.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,850.21 : 47,775.74 = 12,129.86 : x
  2. Step 2: Convert to fraction form
    31,850.21/47,775.74 = 12,129.86/x
  3. Step 3: Cross multiply
    31,850.21x = 47,775.74 × 12,129.86
  4. Step 4: Simplify right side
    31,850.21x = 579,512,738.07
  5. Step 5: Solve for x
    x = 579,512,738.07/31,850.21
  6. Step 6: Final answer
    x = 18,194.95

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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.