Home / 7,947.90-11,920.49-2,105.10

Finding the Fourth Proportional to 7,947.90, 11,920.49 and 2,105.10

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Solution

The fourth proportional to 7,947.90, 11,920.49 and 2,105.10 is: 3,157.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,947.90 : 11,920.49 = 2,105.10 : x
  2. Step 2: Convert to fraction form
    7,947.90/11,920.49 = 2,105.10/x
  3. Step 3: Cross multiply
    7,947.90x = 11,920.49 × 2,105.10
  4. Step 4: Simplify right side
    7,947.90x = 25,093,763.90
  5. Step 5: Solve for x
    x = 25,093,763.90/7,947.90
  6. Step 6: Final answer
    x = 3,157.28

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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.