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Finding the Fourth Proportional to 7,339.77, 10,999.91 and 3,999.47

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Solution

The fourth proportional to 7,339.77, 10,999.91 and 3,999.47 is: 5,993.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,339.77 : 10,999.91 = 3,999.47 : x
  2. Step 2: Convert to fraction form
    7,339.77/10,999.91 = 3,999.47/x
  3. Step 3: Cross multiply
    7,339.77x = 10,999.91 × 3,999.47
  4. Step 4: Simplify right side
    7,339.77x = 43,993,765.05
  5. Step 5: Solve for x
    x = 43,993,765.05/7,339.77
  6. Step 6: Final answer
    x = 5,993.89

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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.