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Finding the Fourth Proportional to 18,863.36, 28,300.80 and 11,928.32

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Solution

The fourth proportional to 18,863.36, 28,300.80 and 11,928.32 is: 17,896.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,863.36 : 28,300.80 = 11,928.32 : x
  2. Step 2: Convert to fraction form
    18,863.36/28,300.80 = 11,928.32/x
  3. Step 3: Cross multiply
    18,863.36x = 28,300.80 × 11,928.32
  4. Step 4: Simplify right side
    18,863.36x = 337,580,998.66
  5. Step 5: Solve for x
    x = 337,580,998.66/18,863.36
  6. Step 6: Final answer
    x = 17,896.12

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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.