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Finding the Fourth Proportional to 7,999.80, 11,039.28 and 4,414.64

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Solution

The fourth proportional to 7,999.80, 11,039.28 and 4,414.64 is: 6,091.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,999.80 : 11,039.28 = 4,414.64 : x
  2. Step 2: Convert to fraction form
    7,999.80/11,039.28 = 4,414.64/x
  3. Step 3: Cross multiply
    7,999.80x = 11,039.28 × 4,414.64
  4. Step 4: Simplify right side
    7,999.80x = 48,734,447.06
  5. Step 5: Solve for x
    x = 48,734,447.06/7,999.80
  6. Step 6: Final answer
    x = 6,091.96

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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.