Home / 5,418.09-8,128.22-1,955.61

Finding the Fourth Proportional to 5,418.09, 8,128.22 and 1,955.61

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Solution

The fourth proportional to 5,418.09, 8,128.22 and 1,955.61 is: 2,933.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,418.09 : 8,128.22 = 1,955.61 : x
  2. Step 2: Convert to fraction form
    5,418.09/8,128.22 = 1,955.61/x
  3. Step 3: Cross multiply
    5,418.09x = 8,128.22 × 1,955.61
  4. Step 4: Simplify right side
    5,418.09x = 15,895,618.54
  5. Step 5: Solve for x
    x = 15,895,618.54/5,418.09
  6. Step 6: Final answer
    x = 2,933.80

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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.