Home / 13,786.40-20,679.48-3,398.24

Finding the Fourth Proportional to 13,786.40, 20,679.48 and 3,398.24

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Solution

The fourth proportional to 13,786.40, 20,679.48 and 3,398.24 is: 5,097.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,786.40 : 20,679.48 = 3,398.24 : x
  2. Step 2: Convert to fraction form
    13,786.40/20,679.48 = 3,398.24/x
  3. Step 3: Cross multiply
    13,786.40x = 20,679.48 × 3,398.24
  4. Step 4: Simplify right side
    13,786.40x = 70,273,836.12
  5. Step 5: Solve for x
    x = 70,273,836.12/13,786.40
  6. Step 6: Final answer
    x = 5,097.33

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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.