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Finding the Fourth Proportional to 12,838.70, 17,716.61 and 8,063.45

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Solution

The fourth proportional to 12,838.70, 17,716.61 and 8,063.45 is: 11,127.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,838.70 : 17,716.61 = 8,063.45 : x
  2. Step 2: Convert to fraction form
    12,838.70/17,716.61 = 8,063.45/x
  3. Step 3: Cross multiply
    12,838.70x = 17,716.61 × 8,063.45
  4. Step 4: Simplify right side
    12,838.70x = 142,856,870.00
  5. Step 5: Solve for x
    x = 142,856,870.00/12,838.70
  6. Step 6: Final answer
    x = 11,127.06

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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.