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Finding the Fourth Proportional to 6,878.44, 9,480.42 and 4,991.08

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Solution

The fourth proportional to 6,878.44, 9,480.42 and 4,991.08 is: 6,879.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,878.44 : 9,480.42 = 4,991.08 : x
  2. Step 2: Convert to fraction form
    6,878.44/9,480.42 = 4,991.08/x
  3. Step 3: Cross multiply
    6,878.44x = 9,480.42 × 4,991.08
  4. Step 4: Simplify right side
    6,878.44x = 47,317,534.65
  5. Step 5: Solve for x
    x = 47,317,534.65/6,878.44
  6. Step 6: Final answer
    x = 6,879.11

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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.