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Finding the Fourth Proportional to 8,841, 12,201.18 and 5,115

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Solution

The fourth proportional to 8,841, 12,201.18 and 5,115 is: 7,059.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,841 : 12,201.18 = 5,115 : x
  2. Step 2: Convert to fraction form
    8,841/12,201.18 = 5,115/x
  3. Step 3: Cross multiply
    8,841x = 12,201.18 × 5,115
  4. Step 4: Simplify right side
    8,841x = 62,409,035.70
  5. Step 5: Solve for x
    x = 62,409,035.70/8,841
  6. Step 6: Final answer
    x = 7,059.05

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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.