Home / 7,947.90-11,921.97-2,104.65

Finding the Fourth Proportional to 7,947.90, 11,921.97 and 2,104.65

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Solution

The fourth proportional to 7,947.90, 11,921.97 and 2,104.65 is: 3,157.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,947.90 : 11,921.97 = 2,104.65 : x
  2. Step 2: Convert to fraction form
    7,947.90/11,921.97 = 2,104.65/x
  3. Step 3: Cross multiply
    7,947.90x = 11,921.97 × 2,104.65
  4. Step 4: Simplify right side
    7,947.90x = 25,091,574.16
  5. Step 5: Solve for x
    x = 25,091,574.16/7,947.90
  6. Step 6: Final answer
    x = 3,157.01

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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.