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Finding the Fourth Proportional to 13,059.20, 18,021.45 and 7,393.86

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Solution

The fourth proportional to 13,059.20, 18,021.45 and 7,393.86 is: 10,203.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,059.20 : 18,021.45 = 7,393.86 : x
  2. Step 2: Convert to fraction form
    13,059.20/18,021.45 = 7,393.86/x
  3. Step 3: Cross multiply
    13,059.20x = 18,021.45 × 7,393.86
  4. Step 4: Simplify right side
    13,059.20x = 133,248,106.02
  5. Step 5: Solve for x
    x = 133,248,106.02/13,059.20
  6. Step 6: Final answer
    x = 10,203.39

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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.