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Finding the Fourth Proportional to 8,321.98, 12,485.48 and 4,811.19

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Solution

The fourth proportional to 8,321.98, 12,485.48 and 4,811.19 is: 7,218.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,321.98 : 12,485.48 = 4,811.19 : x
  2. Step 2: Convert to fraction form
    8,321.98/12,485.48 = 4,811.19/x
  3. Step 3: Cross multiply
    8,321.98x = 12,485.48 × 4,811.19
  4. Step 4: Simplify right side
    8,321.98x = 60,069,992.47
  5. Step 5: Solve for x
    x = 60,069,992.47/8,321.98
  6. Step 6: Final answer
    x = 7,218.24

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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.