Home / 5,121.36-7,066.19-3,131.19

Finding the Fourth Proportional to 5,121.36, 7,066.19 and 3,131.19

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Solution

The fourth proportional to 5,121.36, 7,066.19 and 3,131.19 is: 4,320.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.36 : 7,066.19 = 3,131.19 : x
  2. Step 2: Convert to fraction form
    5,121.36/7,066.19 = 3,131.19/x
  3. Step 3: Cross multiply
    5,121.36x = 7,066.19 × 3,131.19
  4. Step 4: Simplify right side
    5,121.36x = 22,125,591.29
  5. Step 5: Solve for x
    x = 22,125,591.29/5,121.36
  6. Step 6: Final answer
    x = 4,320.26

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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.