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Finding the Fourth Proportional to 28,796.33, 39,739.78 and 16,858.55

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Solution

The fourth proportional to 28,796.33, 39,739.78 and 16,858.55 is: 23,265.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,796.33 : 39,739.78 = 16,858.55 : x
  2. Step 2: Convert to fraction form
    28,796.33/39,739.78 = 16,858.55/x
  3. Step 3: Cross multiply
    28,796.33x = 39,739.78 × 16,858.55
  4. Step 4: Simplify right side
    28,796.33x = 669,955,188.54
  5. Step 5: Solve for x
    x = 669,955,188.54/28,796.33
  6. Step 6: Final answer
    x = 23,265.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.