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Finding the Fourth Proportional to 31,682.76, 47,520.42 and 8,311.02

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Solution

The fourth proportional to 31,682.76, 47,520.42 and 8,311.02 is: 12,465.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,682.76 : 47,520.42 = 8,311.02 : x
  2. Step 2: Convert to fraction form
    31,682.76/47,520.42 = 8,311.02/x
  3. Step 3: Cross multiply
    31,682.76x = 47,520.42 × 8,311.02
  4. Step 4: Simplify right side
    31,682.76x = 394,943,161.03
  5. Step 5: Solve for x
    x = 394,943,161.03/31,682.76
  6. Step 6: Final answer
    x = 12,465.55

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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.