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Finding the Fourth Proportional to 31,773.60, 47,660.40 and 8,081.10

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Solution

The fourth proportional to 31,773.60, 47,660.40 and 8,081.10 is: 12,121.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,773.60 : 47,660.40 = 8,081.10 : x
  2. Step 2: Convert to fraction form
    31,773.60/47,660.40 = 8,081.10/x
  3. Step 3: Cross multiply
    31,773.60x = 47,660.40 × 8,081.10
  4. Step 4: Simplify right side
    31,773.60x = 385,148,458.44
  5. Step 5: Solve for x
    x = 385,148,458.44/31,773.60
  6. Step 6: Final answer
    x = 12,121.65

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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.