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Finding the Fourth Proportional to 19,135.76, 28,515.82 and 18,509.36

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Solution

The fourth proportional to 19,135.76, 28,515.82 and 18,509.36 is: 27,582.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,135.76 : 28,515.82 = 18,509.36 : x
  2. Step 2: Convert to fraction form
    19,135.76/28,515.82 = 18,509.36/x
  3. Step 3: Cross multiply
    19,135.76x = 28,515.82 × 18,509.36
  4. Step 4: Simplify right side
    19,135.76x = 527,809,578.08
  5. Step 5: Solve for x
    x = 527,809,578.08/19,135.76
  6. Step 6: Final answer
    x = 27,582.37

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These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.