Home / 5,120.39-7,066.74-3,131.22

Finding the Fourth Proportional to 5,120.39, 7,066.74 and 3,131.22

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Solution

The fourth proportional to 5,120.39, 7,066.74 and 3,131.22 is: 4,321.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.39 : 7,066.74 = 3,131.22 : x
  2. Step 2: Convert to fraction form
    5,120.39/7,066.74 = 3,131.22/x
  3. Step 3: Cross multiply
    5,120.39x = 7,066.74 × 3,131.22
  4. Step 4: Simplify right side
    5,120.39x = 22,127,517.62
  5. Step 5: Solve for x
    x = 22,127,517.62/5,120.39
  6. Step 6: Final answer
    x = 4,321.46

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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.