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Finding the Fourth Proportional to 7,121.67, 10,682.51 and 1,927.54

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Solution

The fourth proportional to 7,121.67, 10,682.51 and 1,927.54 is: 2,891.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.67 : 10,682.51 = 1,927.54 : x
  2. Step 2: Convert to fraction form
    7,121.67/10,682.51 = 1,927.54/x
  3. Step 3: Cross multiply
    7,121.67x = 10,682.51 × 1,927.54
  4. Step 4: Simplify right side
    7,121.67x = 20,590,965.33
  5. Step 5: Solve for x
    x = 20,590,965.33/7,121.67
  6. Step 6: Final answer
    x = 2,891.31

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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.