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Finding the Fourth Proportional to 13,251, 19,876.50 and 4,017

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Solution

The fourth proportional to 13,251, 19,876.50 and 4,017 is: 6,025.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,251 : 19,876.50 = 4,017 : x
  2. Step 2: Convert to fraction form
    13,251/19,876.50 = 4,017/x
  3. Step 3: Cross multiply
    13,251x = 19,876.50 × 4,017
  4. Step 4: Simplify right side
    13,251x = 79,843,900.50
  5. Step 5: Solve for x
    x = 79,843,900.50/13,251
  6. Step 6: Final answer
    x = 6,025.50

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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.