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Finding the Fourth Proportional to 31,504, 47,256.18 and 8,128.84

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Solution

The fourth proportional to 31,504, 47,256.18 and 8,128.84 is: 12,193.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,504 : 47,256.18 = 8,128.84 : x
  2. Step 2: Convert to fraction form
    31,504/47,256.18 = 8,128.84/x
  3. Step 3: Cross multiply
    31,504x = 47,256.18 × 8,128.84
  4. Step 4: Simplify right side
    31,504x = 384,137,926.23
  5. Step 5: Solve for x
    x = 384,137,926.23/31,504
  6. Step 6: Final answer
    x = 12,193.31

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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.