Home / 18,728.82-28,072.04-7,621.56

Finding the Fourth Proportional to 18,728.82, 28,072.04 and 7,621.56

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Solution

The fourth proportional to 18,728.82, 28,072.04 and 7,621.56 is: 11,423.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,728.82 : 28,072.04 = 7,621.56 : x
  2. Step 2: Convert to fraction form
    18,728.82/28,072.04 = 7,621.56/x
  3. Step 3: Cross multiply
    18,728.82x = 28,072.04 × 7,621.56
  4. Step 4: Simplify right side
    18,728.82x = 213,952,699.07
  5. Step 5: Solve for x
    x = 213,952,699.07/18,728.82
  6. Step 6: Final answer
    x = 11,423.71

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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.