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Finding the Fourth Proportional to 38,911.44, 53,692.07 and 21,912.30

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Solution

The fourth proportional to 38,911.44, 53,692.07 and 21,912.30 is: 30,235.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,911.44 : 53,692.07 = 21,912.30 : x
  2. Step 2: Convert to fraction form
    38,911.44/53,692.07 = 21,912.30/x
  3. Step 3: Cross multiply
    38,911.44x = 53,692.07 × 21,912.30
  4. Step 4: Simplify right side
    38,911.44x = 1,176,516,635.90
  5. Step 5: Solve for x
    x = 1,176,516,635.90/38,911.44
  6. Step 6: Final answer
    x = 30,235.75

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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.