Home / 20,105.37-30,147.75-10,622.78

Finding the Fourth Proportional to 20,105.37, 30,147.75 and 10,622.78

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Solution

The fourth proportional to 20,105.37, 30,147.75 and 10,622.78 is: 15,928.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,105.37 : 30,147.75 = 10,622.78 : x
  2. Step 2: Convert to fraction form
    20,105.37/30,147.75 = 10,622.78/x
  3. Step 3: Cross multiply
    20,105.37x = 30,147.75 × 10,622.78
  4. Step 4: Simplify right side
    20,105.37x = 320,252,840.38
  5. Step 5: Solve for x
    x = 320,252,840.38/20,105.37
  6. Step 6: Final answer
    x = 15,928.72

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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.