Home / 3,421.43-5,129.51-1,571.21

Finding the Fourth Proportional to 3,421.43, 5,129.51 and 1,571.21

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Solution

The fourth proportional to 3,421.43, 5,129.51 and 1,571.21 is: 2,355.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.43 : 5,129.51 = 1,571.21 : x
  2. Step 2: Convert to fraction form
    3,421.43/5,129.51 = 1,571.21/x
  3. Step 3: Cross multiply
    3,421.43x = 5,129.51 × 1,571.21
  4. Step 4: Simplify right side
    3,421.43x = 8,059,503.90
  5. Step 5: Solve for x
    x = 8,059,503.90/3,421.43
  6. Step 6: Final answer
    x = 2,355.60

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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.