Home / 5,645.97-7,791.81-3,128.18

Finding the Fourth Proportional to 5,645.97, 7,791.81 and 3,128.18

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Solution

The fourth proportional to 5,645.97, 7,791.81 and 3,128.18 is: 4,317.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,645.97 : 7,791.81 = 3,128.18 : x
  2. Step 2: Convert to fraction form
    5,645.97/7,791.81 = 3,128.18/x
  3. Step 3: Cross multiply
    5,645.97x = 7,791.81 × 3,128.18
  4. Step 4: Simplify right side
    5,645.97x = 24,374,184.21
  5. Step 5: Solve for x
    x = 24,374,184.21/5,645.97
  6. Step 6: Final answer
    x = 4,317.09

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Half scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.