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Finding the Fourth Proportional to 31,791.80, 47,673.30 and 12,063.80

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Solution

The fourth proportional to 31,791.80, 47,673.30 and 12,063.80 is: 18,090.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,791.80 : 47,673.30 = 12,063.80 : x
  2. Step 2: Convert to fraction form
    31,791.80/47,673.30 = 12,063.80/x
  3. Step 3: Cross multiply
    31,791.80x = 47,673.30 × 12,063.80
  4. Step 4: Simplify right side
    31,791.80x = 575,121,156.54
  5. Step 5: Solve for x
    x = 575,121,156.54/31,791.80
  6. Step 6: Final answer
    x = 18,090.24

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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.