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Finding the Fourth Proportional to 13,059.39, 18,021.68 and 7,091.01

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Solution

The fourth proportional to 13,059.39, 18,021.68 and 7,091.01 is: 9,785.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,059.39 : 18,021.68 = 7,091.01 : x
  2. Step 2: Convert to fraction form
    13,059.39/18,021.68 = 7,091.01/x
  3. Step 3: Cross multiply
    13,059.39x = 18,021.68 × 7,091.01
  4. Step 4: Simplify right side
    13,059.39x = 127,791,877.64
  5. Step 5: Solve for x
    x = 127,791,877.64/13,059.39
  6. Step 6: Final answer
    x = 9,785.44

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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.