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Finding the Fourth Proportional to 18,855.55, 28,282.85 and 4,815.69

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Solution

The fourth proportional to 18,855.55, 28,282.85 and 4,815.69 is: 7,223.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,855.55 : 28,282.85 = 4,815.69 : x
  2. Step 2: Convert to fraction form
    18,855.55/28,282.85 = 4,815.69/x
  3. Step 3: Cross multiply
    18,855.55x = 28,282.85 × 4,815.69
  4. Step 4: Simplify right side
    18,855.55x = 136,201,352.92
  5. Step 5: Solve for x
    x = 136,201,352.92/18,855.55
  6. Step 6: Final answer
    x = 7,223.41

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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.