Home / 20,997.89-28,975.99-13,039.94

Finding the Fourth Proportional to 20,997.89, 28,975.99 and 13,039.94

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Solution

The fourth proportional to 20,997.89, 28,975.99 and 13,039.94 is: 17,994.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,997.89 : 28,975.99 = 13,039.94 : x
  2. Step 2: Convert to fraction form
    20,997.89/28,975.99 = 13,039.94/x
  3. Step 3: Cross multiply
    20,997.89x = 28,975.99 × 13,039.94
  4. Step 4: Simplify right side
    20,997.89x = 377,845,171.04
  5. Step 5: Solve for x
    x = 377,845,171.04/20,997.89
  6. Step 6: Final answer
    x = 17,994.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.