Home / 15,738.93-21,720.12-8,665.41

Finding the Fourth Proportional to 15,738.93, 21,720.12 and 8,665.41

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Solution

The fourth proportional to 15,738.93, 21,720.12 and 8,665.41 is: 11,958.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,738.93 : 21,720.12 = 8,665.41 : x
  2. Step 2: Convert to fraction form
    15,738.93/21,720.12 = 8,665.41/x
  3. Step 3: Cross multiply
    15,738.93x = 21,720.12 × 8,665.41
  4. Step 4: Simplify right side
    15,738.93x = 188,213,745.05
  5. Step 5: Solve for x
    x = 188,213,745.05/15,738.93
  6. Step 6: Final answer
    x = 11,958.48

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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.