Home / 5,421.38-8,128.42-2,498.09

Finding the Fourth Proportional to 5,421.38, 8,128.42 and 2,498.09

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Solution

The fourth proportional to 5,421.38, 8,128.42 and 2,498.09 is: 3,745.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,421.38 : 8,128.42 = 2,498.09 : x
  2. Step 2: Convert to fraction form
    5,421.38/8,128.42 = 2,498.09/x
  3. Step 3: Cross multiply
    5,421.38x = 8,128.42 × 2,498.09
  4. Step 4: Simplify right side
    5,421.38x = 20,305,477.83
  5. Step 5: Solve for x
    x = 20,305,477.83/5,421.38
  6. Step 6: Final answer
    x = 3,745.45

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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.