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Finding the Fourth Proportional to 7,003.20, 10,504.80 and 6,139.20

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Solution

The fourth proportional to 7,003.20, 10,504.80 and 6,139.20 is: 9,208.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,003.20 : 10,504.80 = 6,139.20 : x
  2. Step 2: Convert to fraction form
    7,003.20/10,504.80 = 6,139.20/x
  3. Step 3: Cross multiply
    7,003.20x = 10,504.80 × 6,139.20
  4. Step 4: Simplify right side
    7,003.20x = 64,491,068.16
  5. Step 5: Solve for x
    x = 64,491,068.16/7,003.20
  6. Step 6: Final answer
    x = 9,208.80

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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.