Home / 20,629.35-30,940.79-7,977.32

Finding the Fourth Proportional to 20,629.35, 30,940.79 and 7,977.32

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Solution

The fourth proportional to 20,629.35, 30,940.79 and 7,977.32 is: 11,964.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,629.35 : 30,940.79 = 7,977.32 : x
  2. Step 2: Convert to fraction form
    20,629.35/30,940.79 = 7,977.32/x
  3. Step 3: Cross multiply
    20,629.35x = 30,940.79 × 7,977.32
  4. Step 4: Simplify right side
    20,629.35x = 246,824,582.88
  5. Step 5: Solve for x
    x = 246,824,582.88/20,629.35
  6. Step 6: Final answer
    x = 11,964.73

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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.