Home / 5,421.63-8,128.79-2,498.34

Finding the Fourth Proportional to 5,421.63, 8,128.79 and 2,498.34

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Solution

The fourth proportional to 5,421.63, 8,128.79 and 2,498.34 is: 3,745.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,421.63 : 8,128.79 = 2,498.34 : x
  2. Step 2: Convert to fraction form
    5,421.63/8,128.79 = 2,498.34/x
  3. Step 3: Cross multiply
    5,421.63x = 8,128.79 × 2,498.34
  4. Step 4: Simplify right side
    5,421.63x = 20,308,481.21
  5. Step 5: Solve for x
    x = 20,308,481.21/5,421.63
  6. Step 6: Final answer
    x = 3,745.83

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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.