Home / 39,633.20-54,693.60-21,728.96

Finding the Fourth Proportional to 39,633.20, 54,693.60 and 21,728.96

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Solution

The fourth proportional to 39,633.20, 54,693.60 and 21,728.96 is: 29,985.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,633.20 : 54,693.60 = 21,728.96 : x
  2. Step 2: Convert to fraction form
    39,633.20/54,693.60 = 21,728.96/x
  3. Step 3: Cross multiply
    39,633.20x = 54,693.60 × 21,728.96
  4. Step 4: Simplify right side
    39,633.20x = 1,188,435,046.66
  5. Step 5: Solve for x
    x = 1,188,435,046.66/39,633.20
  6. Step 6: Final answer
    x = 29,985.85

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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.