Home / 7,121.93-10,685.18-3,424.43

Finding the Fourth Proportional to 7,121.93, 10,685.18 and 3,424.43

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Solution

The fourth proportional to 7,121.93, 10,685.18 and 3,424.43 is: 5,137.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.93 : 10,685.18 = 3,424.43 : x
  2. Step 2: Convert to fraction form
    7,121.93/10,685.18 = 3,424.43/x
  3. Step 3: Cross multiply
    7,121.93x = 10,685.18 × 3,424.43
  4. Step 4: Simplify right side
    7,121.93x = 36,590,650.95
  5. Step 5: Solve for x
    x = 36,590,650.95/7,121.93
  6. Step 6: Final answer
    x = 5,137.74

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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.