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Finding the Fourth Proportional to 18,390.69, 25,375.30 and 11,668.41

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Solution

The fourth proportional to 18,390.69, 25,375.30 and 11,668.41 is: 16,099.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,390.69 : 25,375.30 = 11,668.41 : x
  2. Step 2: Convert to fraction form
    18,390.69/25,375.30 = 11,668.41/x
  3. Step 3: Cross multiply
    18,390.69x = 25,375.30 × 11,668.41
  4. Step 4: Simplify right side
    18,390.69x = 296,089,404.27
  5. Step 5: Solve for x
    x = 296,089,404.27/18,390.69
  6. Step 6: Final answer
    x = 16,099.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.