Home / 13,378.39-20,080.68-11,171.34

Finding the Fourth Proportional to 13,378.39, 20,080.68 and 11,171.34

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Solution

The fourth proportional to 13,378.39, 20,080.68 and 11,171.34 is: 16,767.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,378.39 : 20,080.68 = 11,171.34 : x
  2. Step 2: Convert to fraction form
    13,378.39/20,080.68 = 11,171.34/x
  3. Step 3: Cross multiply
    13,378.39x = 20,080.68 × 11,171.34
  4. Step 4: Simplify right side
    13,378.39x = 224,328,103.71
  5. Step 5: Solve for x
    x = 224,328,103.71/13,378.39
  6. Step 6: Final answer
    x = 16,767.95

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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.