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Finding the Fourth Proportional to 39,773.75, 54,886.37 and 21,868.63

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Solution

The fourth proportional to 39,773.75, 54,886.37 and 21,868.63 is: 30,177.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,773.75 : 54,886.37 = 21,868.63 : x
  2. Step 2: Convert to fraction form
    39,773.75/54,886.37 = 21,868.63/x
  3. Step 3: Cross multiply
    39,773.75x = 54,886.37 × 21,868.63
  4. Step 4: Simplify right side
    39,773.75x = 1,200,289,717.57
  5. Step 5: Solve for x
    x = 1,200,289,717.57/39,773.75
  6. Step 6: Final answer
    x = 30,177.94

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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.