Home / 28,205.87-38,911.57-18,132.44

Finding the Fourth Proportional to 28,205.87, 38,911.57 and 18,132.44

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Solution

The fourth proportional to 28,205.87, 38,911.57 and 18,132.44 is: 25,014.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,205.87 : 38,911.57 = 18,132.44 : x
  2. Step 2: Convert to fraction form
    28,205.87/38,911.57 = 18,132.44/x
  3. Step 3: Cross multiply
    28,205.87x = 38,911.57 × 18,132.44
  4. Step 4: Simplify right side
    28,205.87x = 705,561,468.44
  5. Step 5: Solve for x
    x = 705,561,468.44/28,205.87
  6. Step 6: Final answer
    x = 25,014.71

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1.5x scale

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.