Home / 18,751.20-28,128.48-5,423.99

Finding the Fourth Proportional to 18,751.20, 28,128.48 and 5,423.99

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Solution

The fourth proportional to 18,751.20, 28,128.48 and 5,423.99 is: 8,136.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,751.20 : 28,128.48 = 5,423.99 : x
  2. Step 2: Convert to fraction form
    18,751.20/28,128.48 = 5,423.99/x
  3. Step 3: Cross multiply
    18,751.20x = 28,128.48 × 5,423.99
  4. Step 4: Simplify right side
    18,751.20x = 152,568,453.59
  5. Step 5: Solve for x
    x = 152,568,453.59/18,751.20
  6. Step 6: Final answer
    x = 8,136.46

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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.