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Finding the Fourth Proportional to 19,111.94, 28,653.03 and 9,111.54

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Solution

The fourth proportional to 19,111.94, 28,653.03 and 9,111.54 is: 13,660.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,111.94 : 28,653.03 = 9,111.54 : x
  2. Step 2: Convert to fraction form
    19,111.94/28,653.03 = 9,111.54/x
  3. Step 3: Cross multiply
    19,111.94x = 28,653.03 × 9,111.54
  4. Step 4: Simplify right side
    19,111.94x = 261,073,228.97
  5. Step 5: Solve for x
    x = 261,073,228.97/19,111.94
  6. Step 6: Final answer
    x = 13,660.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.