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Finding the Fourth Proportional to 43,991.78, 65,991.29 and 14,408.96

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Solution

The fourth proportional to 43,991.78, 65,991.29 and 14,408.96 is: 21,614.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,991.78 : 65,991.29 = 14,408.96 : x
  2. Step 2: Convert to fraction form
    43,991.78/65,991.29 = 14,408.96/x
  3. Step 3: Cross multiply
    43,991.78x = 65,991.29 × 14,408.96
  4. Step 4: Simplify right side
    43,991.78x = 950,865,455.96
  5. Step 5: Solve for x
    x = 950,865,455.96/43,991.78
  6. Step 6: Final answer
    x = 21,614.62

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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.