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Finding the Fourth Proportional to 20,698.44, 28,563.96 and 11,267

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Solution

The fourth proportional to 20,698.44, 28,563.96 and 11,267 is: 15,548.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,698.44 : 28,563.96 = 11,267 : x
  2. Step 2: Convert to fraction form
    20,698.44/28,563.96 = 11,267/x
  3. Step 3: Cross multiply
    20,698.44x = 28,563.96 × 11,267
  4. Step 4: Simplify right side
    20,698.44x = 321,830,137.32
  5. Step 5: Solve for x
    x = 321,830,137.32/20,698.44
  6. Step 6: Final answer
    x = 15,548.52

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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.