Home / 3,891.09-5,369.67-2,122.77

Finding the Fourth Proportional to 3,891.09, 5,369.67 and 2,122.77

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Solution

The fourth proportional to 3,891.09, 5,369.67 and 2,122.77 is: 2,929.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.09 : 5,369.67 = 2,122.77 : x
  2. Step 2: Convert to fraction form
    3,891.09/5,369.67 = 2,122.77/x
  3. Step 3: Cross multiply
    3,891.09x = 5,369.67 × 2,122.77
  4. Step 4: Simplify right side
    3,891.09x = 11,398,574.39
  5. Step 5: Solve for x
    x = 11,398,574.39/3,891.09
  6. Step 6: Final answer
    x = 2,929.40

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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.