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Finding the Fourth Proportional to 18,765.36, 28,153.36 and 7,076.32

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Solution

The fourth proportional to 18,765.36, 28,153.36 and 7,076.32 is: 10,616.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,765.36 : 28,153.36 = 7,076.32 : x
  2. Step 2: Convert to fraction form
    18,765.36/28,153.36 = 7,076.32/x
  3. Step 3: Cross multiply
    18,765.36x = 28,153.36 × 7,076.32
  4. Step 4: Simplify right side
    18,765.36x = 199,222,184.44
  5. Step 5: Solve for x
    x = 199,222,184.44/18,765.36
  6. Step 6: Final answer
    x = 10,616.49

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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.