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Finding the Fourth Proportional to 8,859.99, 12,231.87 and 5,879.86

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Solution

The fourth proportional to 8,859.99, 12,231.87 and 5,879.86 is: 8,117.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,859.99 : 12,231.87 = 5,879.86 : x
  2. Step 2: Convert to fraction form
    8,859.99/12,231.87 = 5,879.86/x
  3. Step 3: Cross multiply
    8,859.99x = 12,231.87 × 5,879.86
  4. Step 4: Simplify right side
    8,859.99x = 71,921,683.14
  5. Step 5: Solve for x
    x = 71,921,683.14/8,859.99
  6. Step 6: Final answer
    x = 8,117.58

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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.