Home / 28,769.20-43,136.20-11,218.80

Finding the Fourth Proportional to 28,769.20, 43,136.20 and 11,218.80

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Solution

The fourth proportional to 28,769.20, 43,136.20 and 11,218.80 is: 16,821.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,769.20 : 43,136.20 = 11,218.80 : x
  2. Step 2: Convert to fraction form
    28,769.20/43,136.20 = 11,218.80/x
  3. Step 3: Cross multiply
    28,769.20x = 43,136.20 × 11,218.80
  4. Step 4: Simplify right side
    28,769.20x = 483,936,400.56
  5. Step 5: Solve for x
    x = 483,936,400.56/28,769.20
  6. Step 6: Final answer
    x = 16,821.34

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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.