Home / 13,138.36-19,706.90-3,778.30

Finding the Fourth Proportional to 13,138.36, 19,706.90 and 3,778.30

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Solution

The fourth proportional to 13,138.36, 19,706.90 and 3,778.30 is: 5,667.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.36 : 19,706.90 = 3,778.30 : x
  2. Step 2: Convert to fraction form
    13,138.36/19,706.90 = 3,778.30/x
  3. Step 3: Cross multiply
    13,138.36x = 19,706.90 × 3,778.30
  4. Step 4: Simplify right side
    13,138.36x = 74,458,641.44
  5. Step 5: Solve for x
    x = 74,458,641.44/13,138.36
  6. Step 6: Final answer
    x = 5,667.27

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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.