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Finding the Fourth Proportional to 12,491.83, 18,736.03 and 4,171.67

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Solution

The fourth proportional to 12,491.83, 18,736.03 and 4,171.67 is: 6,256.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,491.83 : 18,736.03 = 4,171.67 : x
  2. Step 2: Convert to fraction form
    12,491.83/18,736.03 = 4,171.67/x
  3. Step 3: Cross multiply
    12,491.83x = 18,736.03 × 4,171.67
  4. Step 4: Simplify right side
    12,491.83x = 78,160,419.73
  5. Step 5: Solve for x
    x = 78,160,419.73/12,491.83
  6. Step 6: Final answer
    x = 6,256.93

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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.