Home / 13,421.43-20,132.13-3,426.18

Finding the Fourth Proportional to 13,421.43, 20,132.13 and 3,426.18

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Solution

The fourth proportional to 13,421.43, 20,132.13 and 3,426.18 is: 5,139.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.43 : 20,132.13 = 3,426.18 : x
  2. Step 2: Convert to fraction form
    13,421.43/20,132.13 = 3,426.18/x
  3. Step 3: Cross multiply
    13,421.43x = 20,132.13 × 3,426.18
  4. Step 4: Simplify right side
    13,421.43x = 68,976,183.37
  5. Step 5: Solve for x
    x = 68,976,183.37/13,421.43
  6. Step 6: Final answer
    x = 5,139.26

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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.