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Finding the Fourth Proportional to 19,856.40, 29,763.60 and 7,368.40

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Solution

The fourth proportional to 19,856.40, 29,763.60 and 7,368.40 is: 11,044.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,856.40 : 29,763.60 = 7,368.40 : x
  2. Step 2: Convert to fraction form
    19,856.40/29,763.60 = 7,368.40/x
  3. Step 3: Cross multiply
    19,856.40x = 29,763.60 × 7,368.40
  4. Step 4: Simplify right side
    19,856.40x = 219,310,110.24
  5. Step 5: Solve for x
    x = 219,310,110.24/19,856.40
  6. Step 6: Final answer
    x = 11,044.81

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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.