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Finding the Fourth Proportional to 28,228.70, 38,928.56 and 16,896.39

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Solution

The fourth proportional to 28,228.70, 38,928.56 and 16,896.39 is: 23,300.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,228.70 : 38,928.56 = 16,896.39 : x
  2. Step 2: Convert to fraction form
    28,228.70/38,928.56 = 16,896.39/x
  3. Step 3: Cross multiply
    28,228.70x = 38,928.56 × 16,896.39
  4. Step 4: Simplify right side
    28,228.70x = 657,752,047.42
  5. Step 5: Solve for x
    x = 657,752,047.42/28,228.70
  6. Step 6: Final answer
    x = 23,300.83

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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.