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Finding the Fourth Proportional to 8,811.99, 13,230.60 and 7,729.44

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Solution

The fourth proportional to 8,811.99, 13,230.60 and 7,729.44 is: 11,605.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,811.99 : 13,230.60 = 7,729.44 : x
  2. Step 2: Convert to fraction form
    8,811.99/13,230.60 = 7,729.44/x
  3. Step 3: Cross multiply
    8,811.99x = 13,230.60 × 7,729.44
  4. Step 4: Simplify right side
    8,811.99x = 102,265,128.86
  5. Step 5: Solve for x
    x = 102,265,128.86/8,811.99
  6. Step 6: Final answer
    x = 11,605.23

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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.