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Finding the Fourth Proportional to 6,986.82, 9,641.22 and 4,115.09

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Solution

The fourth proportional to 6,986.82, 9,641.22 and 4,115.09 is: 5,678.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,986.82 : 9,641.22 = 4,115.09 : x
  2. Step 2: Convert to fraction form
    6,986.82/9,641.22 = 4,115.09/x
  3. Step 3: Cross multiply
    6,986.82x = 9,641.22 × 4,115.09
  4. Step 4: Simplify right side
    6,986.82x = 39,674,424.37
  5. Step 5: Solve for x
    x = 39,674,424.37/6,986.82
  6. Step 6: Final answer
    x = 5,678.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.