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Finding the Fourth Proportional to 8,488.99, 12,728.62 and 7,999.75

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Solution

The fourth proportional to 8,488.99, 12,728.62 and 7,999.75 is: 11,995.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,488.99 : 12,728.62 = 7,999.75 : x
  2. Step 2: Convert to fraction form
    8,488.99/12,728.62 = 7,999.75/x
  3. Step 3: Cross multiply
    8,488.99x = 12,728.62 × 7,999.75
  4. Step 4: Simplify right side
    8,488.99x = 101,825,777.85
  5. Step 5: Solve for x
    x = 101,825,777.85/8,488.99
  6. Step 6: Final answer
    x = 11,995.04

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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.