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Finding the Fourth Proportional to 7,999.80, 11,999.70 and 4,296.94

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Solution

The fourth proportional to 7,999.80, 11,999.70 and 4,296.94 is: 6,445.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,999.80 : 11,999.70 = 4,296.94 : x
  2. Step 2: Convert to fraction form
    7,999.80/11,999.70 = 4,296.94/x
  3. Step 3: Cross multiply
    7,999.80x = 11,999.70 × 4,296.94
  4. Step 4: Simplify right side
    7,999.80x = 51,561,990.92
  5. Step 5: Solve for x
    x = 51,561,990.92/7,999.80
  6. Step 6: Final answer
    x = 6,445.41

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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.