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Finding the Fourth Proportional to 18,475.60, 27,710.70 and 5,326.60

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Solution

The fourth proportional to 18,475.60, 27,710.70 and 5,326.60 is: 7,989.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,475.60 : 27,710.70 = 5,326.60 : x
  2. Step 2: Convert to fraction form
    18,475.60/27,710.70 = 5,326.60/x
  3. Step 3: Cross multiply
    18,475.60x = 27,710.70 × 5,326.60
  4. Step 4: Simplify right side
    18,475.60x = 147,603,814.62
  5. Step 5: Solve for x
    x = 147,603,814.62/18,475.60
  6. Step 6: Final answer
    x = 7,989.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.