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Finding the Fourth Proportional to 11,860.85, 17,791.58 and 5,619.40

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Solution

The fourth proportional to 11,860.85, 17,791.58 and 5,619.40 is: 8,429.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,860.85 : 17,791.58 = 5,619.40 : x
  2. Step 2: Convert to fraction form
    11,860.85/17,791.58 = 5,619.40/x
  3. Step 3: Cross multiply
    11,860.85x = 17,791.58 × 5,619.40
  4. Step 4: Simplify right side
    11,860.85x = 99,978,004.65
  5. Step 5: Solve for x
    x = 99,978,004.65/11,860.85
  6. Step 6: Final answer
    x = 8,429.24

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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.