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Finding the Fourth Proportional to 12,083.80, 18,111.30 and 5,063.80

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Solution

The fourth proportional to 12,083.80, 18,111.30 and 5,063.80 is: 7,589.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,083.80 : 18,111.30 = 5,063.80 : x
  2. Step 2: Convert to fraction form
    12,083.80/18,111.30 = 5,063.80/x
  3. Step 3: Cross multiply
    12,083.80x = 18,111.30 × 5,063.80
  4. Step 4: Simplify right side
    12,083.80x = 91,712,000.94
  5. Step 5: Solve for x
    x = 91,712,000.94/12,083.80
  6. Step 6: Final answer
    x = 7,589.67

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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.