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Finding the Fourth Proportional to 19,207.90, 28,815.90 and 6,061.60

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Solution

The fourth proportional to 19,207.90, 28,815.90 and 6,061.60 is: 9,093.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,207.90 : 28,815.90 = 6,061.60 : x
  2. Step 2: Convert to fraction form
    19,207.90/28,815.90 = 6,061.60/x
  3. Step 3: Cross multiply
    19,207.90x = 28,815.90 × 6,061.60
  4. Step 4: Simplify right side
    19,207.90x = 174,670,459.44
  5. Step 5: Solve for x
    x = 174,670,459.44/19,207.90
  6. Step 6: Final answer
    x = 9,093.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.