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Finding the Fourth Proportional to 11,947.15, 17,920.21 and 3,626.98

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Solution

The fourth proportional to 11,947.15, 17,920.21 and 3,626.98 is: 5,440.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,947.15 : 17,920.21 = 3,626.98 : x
  2. Step 2: Convert to fraction form
    11,947.15/17,920.21 = 3,626.98/x
  3. Step 3: Cross multiply
    11,947.15x = 17,920.21 × 3,626.98
  4. Step 4: Simplify right side
    11,947.15x = 64,996,243.27
  5. Step 5: Solve for x
    x = 64,996,243.27/11,947.15
  6. Step 6: Final answer
    x = 5,440.31

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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.