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Finding the Fourth Proportional to 18,668.27, 28,007.17 and 6,191.78

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Solution

The fourth proportional to 18,668.27, 28,007.17 and 6,191.78 is: 9,289.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,668.27 : 28,007.17 = 6,191.78 : x
  2. Step 2: Convert to fraction form
    18,668.27/28,007.17 = 6,191.78/x
  3. Step 3: Cross multiply
    18,668.27x = 28,007.17 × 6,191.78
  4. Step 4: Simplify right side
    18,668.27x = 173,414,095.03
  5. Step 5: Solve for x
    x = 173,414,095.03/18,668.27
  6. Step 6: Final answer
    x = 9,289.25

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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.