Home / 5,418.70-8,128.14-1,523.20

Finding the Fourth Proportional to 5,418.70, 8,128.14 and 1,523.20

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Solution

The fourth proportional to 5,418.70, 8,128.14 and 1,523.20 is: 2,284.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,418.70 : 8,128.14 = 1,523.20 : x
  2. Step 2: Convert to fraction form
    5,418.70/8,128.14 = 1,523.20/x
  3. Step 3: Cross multiply
    5,418.70x = 8,128.14 × 1,523.20
  4. Step 4: Simplify right side
    5,418.70x = 12,380,782.85
  5. Step 5: Solve for x
    x = 12,380,782.85/5,418.70
  6. Step 6: Final answer
    x = 2,284.83

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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.