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Finding the Fourth Proportional to 38,989.98, 53,806.11 and 21,994.17

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Solution

The fourth proportional to 38,989.98, 53,806.11 and 21,994.17 is: 30,351.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,989.98 : 53,806.11 = 21,994.17 : x
  2. Step 2: Convert to fraction form
    38,989.98/53,806.11 = 21,994.17/x
  3. Step 3: Cross multiply
    38,989.98x = 53,806.11 × 21,994.17
  4. Step 4: Simplify right side
    38,989.98x = 1,183,420,730.38
  5. Step 5: Solve for x
    x = 1,183,420,730.38/38,989.98
  6. Step 6: Final answer
    x = 30,351.92

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Double scale
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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.