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Finding the Fourth Proportional to 18,815.94, 28,223.94 and 4,775.94

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Solution

The fourth proportional to 18,815.94, 28,223.94 and 4,775.94 is: 7,163.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,815.94 : 28,223.94 = 4,775.94 : x
  2. Step 2: Convert to fraction form
    18,815.94/28,223.94 = 4,775.94/x
  3. Step 3: Cross multiply
    18,815.94x = 28,223.94 × 4,775.94
  4. Step 4: Simplify right side
    18,815.94x = 134,795,844.00
  5. Step 5: Solve for x
    x = 134,795,844.00/18,815.94
  6. Step 6: Final answer
    x = 7,163.92

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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.