Home / 13,429.12-20,142.78-4,069.40

Finding the Fourth Proportional to 13,429.12, 20,142.78 and 4,069.40

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Solution

The fourth proportional to 13,429.12, 20,142.78 and 4,069.40 is: 6,103.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,429.12 : 20,142.78 = 4,069.40 : x
  2. Step 2: Convert to fraction form
    13,429.12/20,142.78 = 4,069.40/x
  3. Step 3: Cross multiply
    13,429.12x = 20,142.78 × 4,069.40
  4. Step 4: Simplify right side
    13,429.12x = 81,969,028.93
  5. Step 5: Solve for x
    x = 81,969,028.93/13,429.12
  6. Step 6: Final answer
    x = 6,103.83

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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.