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Finding the Fourth Proportional to 31,510, 47,265.18 and 8,134.84

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Solution

The fourth proportional to 31,510, 47,265.18 and 8,134.84 is: 12,202.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,510 : 47,265.18 = 8,134.84 : x
  2. Step 2: Convert to fraction form
    31,510/47,265.18 = 8,134.84/x
  3. Step 3: Cross multiply
    31,510x = 47,265.18 × 8,134.84
  4. Step 4: Simplify right side
    31,510x = 384,494,676.87
  5. Step 5: Solve for x
    x = 384,494,676.87/31,510
  6. Step 6: Final answer
    x = 12,202.31

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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.