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Finding the Fourth Proportional to 9,334.87, 12,879.35 and 5,555

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Solution

The fourth proportional to 9,334.87, 12,879.35 and 5,555 is: 7,664.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,334.87 : 12,879.35 = 5,555 : x
  2. Step 2: Convert to fraction form
    9,334.87/12,879.35 = 5,555/x
  3. Step 3: Cross multiply
    9,334.87x = 12,879.35 × 5,555
  4. Step 4: Simplify right side
    9,334.87x = 71,544,789.25
  5. Step 5: Solve for x
    x = 71,544,789.25/9,334.87
  6. Step 6: Final answer
    x = 7,664.26

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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.