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Finding the Fourth Proportional to 7,989.44, 11,984.14 and 3,605.72

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Solution

The fourth proportional to 7,989.44, 11,984.14 and 3,605.72 is: 5,408.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,989.44 : 11,984.14 = 3,605.72 : x
  2. Step 2: Convert to fraction form
    7,989.44/11,984.14 = 3,605.72/x
  3. Step 3: Cross multiply
    7,989.44x = 11,984.14 × 3,605.72
  4. Step 4: Simplify right side
    7,989.44x = 43,211,453.28
  5. Step 5: Solve for x
    x = 43,211,453.28/7,989.44
  6. Step 6: Final answer
    x = 5,408.57

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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.