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Finding the Fourth Proportional to 18,797.85, 28,196.74 and 7,704.55

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Solution

The fourth proportional to 18,797.85, 28,196.74 and 7,704.55 is: 11,556.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,797.85 : 28,196.74 = 7,704.55 : x
  2. Step 2: Convert to fraction form
    18,797.85/28,196.74 = 7,704.55/x
  3. Step 3: Cross multiply
    18,797.85x = 28,196.74 × 7,704.55
  4. Step 4: Simplify right side
    18,797.85x = 217,243,238.04
  5. Step 5: Solve for x
    x = 217,243,238.04/18,797.85
  6. Step 6: Final answer
    x = 11,556.81

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1.5x scale

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.