Home / 13,786.57-20,679.86-3,398.32

Finding the Fourth Proportional to 13,786.57, 20,679.86 and 3,398.32

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Solution

The fourth proportional to 13,786.57, 20,679.86 and 3,398.32 is: 5,097.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,786.57 : 20,679.86 = 3,398.32 : x
  2. Step 2: Convert to fraction form
    13,786.57/20,679.86 = 3,398.32/x
  3. Step 3: Cross multiply
    13,786.57x = 20,679.86 × 3,398.32
  4. Step 4: Simplify right side
    13,786.57x = 70,276,781.84
  5. Step 5: Solve for x
    x = 70,276,781.84/13,786.57
  6. Step 6: Final answer
    x = 5,097.48

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Similar ratio
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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.