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Finding the Fourth Proportional to 13,307.52, 18,363.54 and 7,638.28

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Solution

The fourth proportional to 13,307.52, 18,363.54 and 7,638.28 is: 10,540.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,307.52 : 18,363.54 = 7,638.28 : x
  2. Step 2: Convert to fraction form
    13,307.52/18,363.54 = 7,638.28/x
  3. Step 3: Cross multiply
    13,307.52x = 18,363.54 × 7,638.28
  4. Step 4: Simplify right side
    13,307.52x = 140,265,860.31
  5. Step 5: Solve for x
    x = 140,265,860.31/13,307.52
  6. Step 6: Final answer
    x = 10,540.35

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.