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Finding the Fourth Proportional to 19,904.60, 29,836.90 and 7,416.60

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Solution

The fourth proportional to 19,904.60, 29,836.90 and 7,416.60 is: 11,117.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,904.60 : 29,836.90 = 7,416.60 : x
  2. Step 2: Convert to fraction form
    19,904.60/29,836.90 = 7,416.60/x
  3. Step 3: Cross multiply
    19,904.60x = 29,836.90 × 7,416.60
  4. Step 4: Simplify right side
    19,904.60x = 221,288,352.54
  5. Step 5: Solve for x
    x = 221,288,352.54/19,904.60
  6. Step 6: Final answer
    x = 11,117.45

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