Home / 18,789.89-28,198.52-15,136.25

Finding the Fourth Proportional to 18,789.89, 28,198.52 and 15,136.25

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Solution

The fourth proportional to 18,789.89, 28,198.52 and 15,136.25 is: 22,715.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,789.89 : 28,198.52 = 15,136.25 : x
  2. Step 2: Convert to fraction form
    18,789.89/28,198.52 = 15,136.25/x
  3. Step 3: Cross multiply
    18,789.89x = 28,198.52 × 15,136.25
  4. Step 4: Simplify right side
    18,789.89x = 426,819,631.68
  5. Step 5: Solve for x
    x = 426,819,631.68/18,789.89
  6. Step 6: Final answer
    x = 22,715.39

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1.5x scale

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.