Home / 7,858.31-11,789.99-2,928.65

Finding the Fourth Proportional to 7,858.31, 11,789.99 and 2,928.65

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Solution

The fourth proportional to 7,858.31, 11,789.99 and 2,928.65 is: 4,393.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,858.31 : 11,789.99 = 2,928.65 : x
  2. Step 2: Convert to fraction form
    7,858.31/11,789.99 = 2,928.65/x
  3. Step 3: Cross multiply
    7,858.31x = 11,789.99 × 2,928.65
  4. Step 4: Simplify right side
    7,858.31x = 34,528,680.62
  5. Step 5: Solve for x
    x = 34,528,680.62/7,858.31
  6. Step 6: Final answer
    x = 4,393.91

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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.