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Finding the Fourth Proportional to 38,969.57, 53,778.57 and 21,974.62

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Solution

The fourth proportional to 38,969.57, 53,778.57 and 21,974.62 is: 30,325.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,969.57 : 53,778.57 = 21,974.62 : x
  2. Step 2: Convert to fraction form
    38,969.57/53,778.57 = 21,974.62/x
  3. Step 3: Cross multiply
    38,969.57x = 53,778.57 × 21,974.62
  4. Step 4: Simplify right side
    38,969.57x = 1,181,763,639.89
  5. Step 5: Solve for x
    x = 1,181,763,639.89/38,969.57
  6. Step 6: Final answer
    x = 30,325.30

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Similar ratio
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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.