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Finding the Fourth Proportional to 11,891.79, 17,825.90 and 6,629.22

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Solution

The fourth proportional to 11,891.79, 17,825.90 and 6,629.22 is: 9,937.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,891.79 : 17,825.90 = 6,629.22 : x
  2. Step 2: Convert to fraction form
    11,891.79/17,825.90 = 6,629.22/x
  3. Step 3: Cross multiply
    11,891.79x = 17,825.90 × 6,629.22
  4. Step 4: Simplify right side
    11,891.79x = 118,171,779.65
  5. Step 5: Solve for x
    x = 118,171,779.65/11,891.79
  6. Step 6: Final answer
    x = 9,937.26

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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.