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Finding the Fourth Proportional to 12,491.69, 18,743.60 and 5,910.03

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Solution

The fourth proportional to 12,491.69, 18,743.60 and 5,910.03 is: 8,867.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,491.69 : 18,743.60 = 5,910.03 : x
  2. Step 2: Convert to fraction form
    12,491.69/18,743.60 = 5,910.03/x
  3. Step 3: Cross multiply
    12,491.69x = 18,743.60 × 5,910.03
  4. Step 4: Simplify right side
    12,491.69x = 110,775,253.08
  5. Step 5: Solve for x
    x = 110,775,253.08/12,491.69
  6. Step 6: Final answer
    x = 8,867.92

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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.