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Finding the Fourth Proportional to 43,591.89, 65,379.21 and 11,993.79

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Solution

The fourth proportional to 43,591.89, 65,379.21 and 11,993.79 is: 17,988.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,591.89 : 65,379.21 = 11,993.79 : x
  2. Step 2: Convert to fraction form
    43,591.89/65,379.21 = 11,993.79/x
  3. Step 3: Cross multiply
    43,591.89x = 65,379.21 × 11,993.79
  4. Step 4: Simplify right side
    43,591.89x = 784,144,515.11
  5. Step 5: Solve for x
    x = 784,144,515.11/43,591.89
  6. Step 6: Final answer
    x = 17,988.31

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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.