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Finding the Fourth Proportional to 7,791.65, 11,687.09 and 2,860.91

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Solution

The fourth proportional to 7,791.65, 11,687.09 and 2,860.91 is: 4,291.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,791.65 : 11,687.09 = 2,860.91 : x
  2. Step 2: Convert to fraction form
    7,791.65/11,687.09 = 2,860.91/x
  3. Step 3: Cross multiply
    7,791.65x = 11,687.09 × 2,860.91
  4. Step 4: Simplify right side
    7,791.65x = 33,435,639.91
  5. Step 5: Solve for x
    x = 33,435,639.91/7,791.65
  6. Step 6: Final answer
    x = 4,291.22

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1.5x scale

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.