Home / 13,816.46-20,724.69-3,428.21

Finding the Fourth Proportional to 13,816.46, 20,724.69 and 3,428.21

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Solution

The fourth proportional to 13,816.46, 20,724.69 and 3,428.21 is: 5,142.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,816.46 : 20,724.69 = 3,428.21 : x
  2. Step 2: Convert to fraction form
    13,816.46/20,724.69 = 3,428.21/x
  3. Step 3: Cross multiply
    13,816.46x = 20,724.69 × 3,428.21
  4. Step 4: Simplify right side
    13,816.46x = 71,048,589.50
  5. Step 5: Solve for x
    x = 71,048,589.50/13,816.46
  6. Step 6: Final answer
    x = 5,142.32

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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.