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Finding the Fourth Proportional to 10,918.67, 16,375.16 and 3,125.66

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Solution

The fourth proportional to 10,918.67, 16,375.16 and 3,125.66 is: 4,687.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,918.67 : 16,375.16 = 3,125.66 : x
  2. Step 2: Convert to fraction form
    10,918.67/16,375.16 = 3,125.66/x
  3. Step 3: Cross multiply
    10,918.67x = 16,375.16 × 3,125.66
  4. Step 4: Simplify right side
    10,918.67x = 51,183,108.54
  5. Step 5: Solve for x
    x = 51,183,108.54/10,918.67
  6. Step 6: Final answer
    x = 4,687.67

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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.