Home / 5,418.88-8,128.58-1,956.12

Finding the Fourth Proportional to 5,418.88, 8,128.58 and 1,956.12

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Solution

The fourth proportional to 5,418.88, 8,128.58 and 1,956.12 is: 2,934.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,418.88 : 8,128.58 = 1,956.12 : x
  2. Step 2: Convert to fraction form
    5,418.88/8,128.58 = 1,956.12/x
  3. Step 3: Cross multiply
    5,418.88x = 8,128.58 × 1,956.12
  4. Step 4: Simplify right side
    5,418.88x = 15,900,477.91
  5. Step 5: Solve for x
    x = 15,900,477.91/5,418.88
  6. Step 6: Final answer
    x = 2,934.27

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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.