Home / 15,745.94-21,728.42-8,672.37

Finding the Fourth Proportional to 15,745.94, 21,728.42 and 8,672.37

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Solution

The fourth proportional to 15,745.94, 21,728.42 and 8,672.37 is: 11,967.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,745.94 : 21,728.42 = 8,672.37 : x
  2. Step 2: Convert to fraction form
    15,745.94/21,728.42 = 8,672.37/x
  3. Step 3: Cross multiply
    15,745.94x = 21,728.42 × 8,672.37
  4. Step 4: Simplify right side
    15,745.94x = 188,436,805.43
  5. Step 5: Solve for x
    x = 188,436,805.43/15,745.94
  6. Step 6: Final answer
    x = 11,967.32

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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.