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Finding the Fourth Proportional to 13,913.19, 19,201.26 and 8,611.11

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Solution

The fourth proportional to 13,913.19, 19,201.26 and 8,611.11 is: 11,883.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,913.19 : 19,201.26 = 8,611.11 : x
  2. Step 2: Convert to fraction form
    13,913.19/19,201.26 = 8,611.11/x
  3. Step 3: Cross multiply
    13,913.19x = 19,201.26 × 8,611.11
  4. Step 4: Simplify right side
    13,913.19x = 165,344,162.00
  5. Step 5: Solve for x
    x = 165,344,162.00/13,913.19
  6. Step 6: Final answer
    x = 11,883.99

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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.