Home / 13,128.25-19,692.38-3,400.25

Finding the Fourth Proportional to 13,128.25, 19,692.38 and 3,400.25

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Solution

The fourth proportional to 13,128.25, 19,692.38 and 3,400.25 is: 5,100.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.25 : 19,692.38 = 3,400.25 : x
  2. Step 2: Convert to fraction form
    13,128.25/19,692.38 = 3,400.25/x
  3. Step 3: Cross multiply
    13,128.25x = 19,692.38 × 3,400.25
  4. Step 4: Simplify right side
    13,128.25x = 66,958,998.09
  5. Step 5: Solve for x
    x = 66,958,998.09/13,128.25
  6. Step 6: Final answer
    x = 5,100.38

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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.