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Finding the Fourth Proportional to 17,720.60, 26,580.90 and 16,856.60

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Solution

The fourth proportional to 17,720.60, 26,580.90 and 16,856.60 is: 25,284.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,720.60 : 26,580.90 = 16,856.60 : x
  2. Step 2: Convert to fraction form
    17,720.60/26,580.90 = 16,856.60/x
  3. Step 3: Cross multiply
    17,720.60x = 26,580.90 × 16,856.60
  4. Step 4: Simplify right side
    17,720.60x = 448,063,598.94
  5. Step 5: Solve for x
    x = 448,063,598.94/17,720.60
  6. Step 6: Final answer
    x = 25,284.90

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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.