Home / 18,940.20-28,421.10-7,261.80

Finding the Fourth Proportional to 18,940.20, 28,421.10 and 7,261.80

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Solution

The fourth proportional to 18,940.20, 28,421.10 and 7,261.80 is: 10,896.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,940.20 : 28,421.10 = 7,261.80 : x
  2. Step 2: Convert to fraction form
    18,940.20/28,421.10 = 7,261.80/x
  3. Step 3: Cross multiply
    18,940.20x = 28,421.10 × 7,261.80
  4. Step 4: Simplify right side
    18,940.20x = 206,388,343.98
  5. Step 5: Solve for x
    x = 206,388,343.98/18,940.20
  6. Step 6: Final answer
    x = 10,896.84

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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.