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Finding the Fourth Proportional to 7,919.55, 11,879.06 and 3,762.54

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Solution

The fourth proportional to 7,919.55, 11,879.06 and 3,762.54 is: 5,643.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,919.55 : 11,879.06 = 3,762.54 : x
  2. Step 2: Convert to fraction form
    7,919.55/11,879.06 = 3,762.54/x
  3. Step 3: Cross multiply
    7,919.55x = 11,879.06 × 3,762.54
  4. Step 4: Simplify right side
    7,919.55x = 44,695,438.41
  5. Step 5: Solve for x
    x = 44,695,438.41/7,919.55
  6. Step 6: Final answer
    x = 5,643.68

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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.