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Finding the Fourth Proportional to 18,408.52, 25,404.42 and 10,851.40

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Solution

The fourth proportional to 18,408.52, 25,404.42 and 10,851.40 is: 14,975.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,408.52 : 25,404.42 = 10,851.40 : x
  2. Step 2: Convert to fraction form
    18,408.52/25,404.42 = 10,851.40/x
  3. Step 3: Cross multiply
    18,408.52x = 25,404.42 × 10,851.40
  4. Step 4: Simplify right side
    18,408.52x = 275,673,523.19
  5. Step 5: Solve for x
    x = 275,673,523.19/18,408.52
  6. Step 6: Final answer
    x = 14,975.32

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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.