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Finding the Fourth Proportional to 43,975.73, 65,973.45 and 13,991.69

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Solution

The fourth proportional to 43,975.73, 65,973.45 and 13,991.69 is: 20,990.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,975.73 : 65,973.45 = 13,991.69 : x
  2. Step 2: Convert to fraction form
    43,975.73/65,973.45 = 13,991.69/x
  3. Step 3: Cross multiply
    43,975.73x = 65,973.45 × 13,991.69
  4. Step 4: Simplify right side
    43,975.73x = 923,080,060.63
  5. Step 5: Solve for x
    x = 923,080,060.63/43,975.73
  6. Step 6: Final answer
    x = 20,990.67

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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.