Home / 5,421.51-8,129.19-2,135.34

Finding the Fourth Proportional to 5,421.51, 8,129.19 and 2,135.34

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Solution

The fourth proportional to 5,421.51, 8,129.19 and 2,135.34 is: 3,201.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,421.51 : 8,129.19 = 2,135.34 : x
  2. Step 2: Convert to fraction form
    5,421.51/8,129.19 = 2,135.34/x
  3. Step 3: Cross multiply
    5,421.51x = 8,129.19 × 2,135.34
  4. Step 4: Simplify right side
    5,421.51x = 17,358,584.57
  5. Step 5: Solve for x
    x = 17,358,584.57/5,421.51
  6. Step 6: Final answer
    x = 3,201.80

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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.