Home / 7,121.99-10,686.92-2,679.45

Finding the Fourth Proportional to 7,121.99, 10,686.92 and 2,679.45

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Solution

The fourth proportional to 7,121.99, 10,686.92 and 2,679.45 is: 4,020.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.99 : 10,686.92 = 2,679.45 : x
  2. Step 2: Convert to fraction form
    7,121.99/10,686.92 = 2,679.45/x
  3. Step 3: Cross multiply
    7,121.99x = 10,686.92 × 2,679.45
  4. Step 4: Simplify right side
    7,121.99x = 28,635,029.39
  5. Step 5: Solve for x
    x = 28,635,029.39/7,121.99
  6. Step 6: Final answer
    x = 4,020.65

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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.