Home / 13,928.16-20,891.97-3,398.25

Finding the Fourth Proportional to 13,928.16, 20,891.97 and 3,398.25

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Solution

The fourth proportional to 13,928.16, 20,891.97 and 3,398.25 is: 5,097.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,928.16 : 20,891.97 = 3,398.25 : x
  2. Step 2: Convert to fraction form
    13,928.16/20,891.97 = 3,398.25/x
  3. Step 3: Cross multiply
    13,928.16x = 20,891.97 × 3,398.25
  4. Step 4: Simplify right side
    13,928.16x = 70,996,137.05
  5. Step 5: Solve for x
    x = 70,996,137.05/13,928.16
  6. Step 6: Final answer
    x = 5,097.31

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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.