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Finding the Fourth Proportional to 7,999.86, 11,039.79 and 4,644.64

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Solution

The fourth proportional to 7,999.86, 11,039.79 and 4,644.64 is: 6,409.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,999.86 : 11,039.79 = 4,644.64 : x
  2. Step 2: Convert to fraction form
    7,999.86/11,039.79 = 4,644.64/x
  3. Step 3: Cross multiply
    7,999.86x = 11,039.79 × 4,644.64
  4. Step 4: Simplify right side
    7,999.86x = 51,275,881.44
  5. Step 5: Solve for x
    x = 51,275,881.44/7,999.86
  6. Step 6: Final answer
    x = 6,409.59

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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.