Home / 5,418.80-8,128.86-1,523.21

Finding the Fourth Proportional to 5,418.80, 8,128.86 and 1,523.21

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Solution

The fourth proportional to 5,418.80, 8,128.86 and 1,523.21 is: 2,284.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,418.80 : 8,128.86 = 1,523.21 : x
  2. Step 2: Convert to fraction form
    5,418.80/8,128.86 = 1,523.21/x
  3. Step 3: Cross multiply
    5,418.80x = 8,128.86 × 1,523.21
  4. Step 4: Simplify right side
    5,418.80x = 12,381,914.48
  5. Step 5: Solve for x
    x = 12,381,914.48/5,418.80
  6. Step 6: Final answer
    x = 2,284.99

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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.