Home / 3,891.05-5,369.64-2,122.67

Finding the Fourth Proportional to 3,891.05, 5,369.64 and 2,122.67

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Solution

The fourth proportional to 3,891.05, 5,369.64 and 2,122.67 is: 2,929.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.05 : 5,369.64 = 2,122.67 : x
  2. Step 2: Convert to fraction form
    3,891.05/5,369.64 = 2,122.67/x
  3. Step 3: Cross multiply
    3,891.05x = 5,369.64 × 2,122.67
  4. Step 4: Simplify right side
    3,891.05x = 11,397,946.89
  5. Step 5: Solve for x
    x = 11,397,946.89/3,891.05
  6. Step 6: Final answer
    x = 2,929.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.