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Finding the Fourth Proportional to 18,991.35, 28,462.24 and 13,744.03

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Solution

The fourth proportional to 18,991.35, 28,462.24 and 13,744.03 is: 20,598.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,991.35 : 28,462.24 = 13,744.03 : x
  2. Step 2: Convert to fraction form
    18,991.35/28,462.24 = 13,744.03/x
  3. Step 3: Cross multiply
    18,991.35x = 28,462.24 × 13,744.03
  4. Step 4: Simplify right side
    18,991.35x = 391,185,880.43
  5. Step 5: Solve for x
    x = 391,185,880.43/18,991.35
  6. Step 6: Final answer
    x = 20,598.11

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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.