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Finding the Fourth Proportional to 28,399.25, 42,598.86 and 7,622.75

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Solution

The fourth proportional to 28,399.25, 42,598.86 and 7,622.75 is: 11,434.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,399.25 : 42,598.86 = 7,622.75 : x
  2. Step 2: Convert to fraction form
    28,399.25/42,598.86 = 7,622.75/x
  3. Step 3: Cross multiply
    28,399.25x = 42,598.86 × 7,622.75
  4. Step 4: Simplify right side
    28,399.25x = 324,720,460.07
  5. Step 5: Solve for x
    x = 324,720,460.07/28,399.25
  6. Step 6: Final answer
    x = 11,434.12

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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.