Home / 20,420.04-30,634.92-7,940.37

Finding the Fourth Proportional to 20,420.04, 30,634.92 and 7,940.37

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Solution

The fourth proportional to 20,420.04, 30,634.92 and 7,940.37 is: 11,912.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,420.04 : 30,634.92 = 7,940.37 : x
  2. Step 2: Convert to fraction form
    20,420.04/30,634.92 = 7,940.37/x
  3. Step 3: Cross multiply
    20,420.04x = 30,634.92 × 7,940.37
  4. Step 4: Simplify right side
    20,420.04x = 243,252,599.72
  5. Step 5: Solve for x
    x = 243,252,599.72/20,420.04
  6. Step 6: Final answer
    x = 11,912.44

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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.