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Finding the Fourth Proportional to 7,472.09, 10,311.55 and 4,115.00

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Solution

The fourth proportional to 7,472.09, 10,311.55 and 4,115.00 is: 5,678.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,472.09 : 10,311.55 = 4,115.00 : x
  2. Step 2: Convert to fraction form
    7,472.09/10,311.55 = 4,115.00/x
  3. Step 3: Cross multiply
    7,472.09x = 10,311.55 × 4,115.00
  4. Step 4: Simplify right side
    7,472.09x = 42,432,059.17
  5. Step 5: Solve for x
    x = 42,432,059.17/7,472.09
  6. Step 6: Final answer
    x = 5,678.74

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.