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Finding the Fourth Proportional to 18,765.73, 25,895.95 and 11,216.23

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Solution

The fourth proportional to 18,765.73, 25,895.95 and 11,216.23 is: 15,477.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,765.73 : 25,895.95 = 11,216.23 : x
  2. Step 2: Convert to fraction form
    18,765.73/25,895.95 = 11,216.23/x
  3. Step 3: Cross multiply
    18,765.73x = 25,895.95 × 11,216.23
  4. Step 4: Simplify right side
    18,765.73x = 290,454,974.41
  5. Step 5: Solve for x
    x = 290,454,974.41/18,765.73
  6. Step 6: Final answer
    x = 15,477.94

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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.