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Finding the Fourth Proportional to 17,687.87, 24,408.29 and 9,728.81

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Solution

The fourth proportional to 17,687.87, 24,408.29 and 9,728.81 is: 13,425.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,687.87 : 24,408.29 = 9,728.81 : x
  2. Step 2: Convert to fraction form
    17,687.87/24,408.29 = 9,728.81/x
  3. Step 3: Cross multiply
    17,687.87x = 24,408.29 × 9,728.81
  4. Step 4: Simplify right side
    17,687.87x = 237,463,518.12
  5. Step 5: Solve for x
    x = 237,463,518.12/17,687.87
  6. Step 6: Final answer
    x = 13,425.22

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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.