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Finding the Fourth Proportional to 18,851.94, 28,278 and 5,704.20

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Solution

The fourth proportional to 18,851.94, 28,278 and 5,704.20 is: 8,556.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,851.94 : 28,278 = 5,704.20 : x
  2. Step 2: Convert to fraction form
    18,851.94/28,278 = 5,704.20/x
  3. Step 3: Cross multiply
    18,851.94x = 28,278 × 5,704.20
  4. Step 4: Simplify right side
    18,851.94x = 161,303,367.60
  5. Step 5: Solve for x
    x = 161,303,367.60/18,851.94
  6. Step 6: Final answer
    x = 8,556.33

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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.