Home / 12,211.75-18,317.63-5,286.25

Finding the Fourth Proportional to 12,211.75, 18,317.63 and 5,286.25

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Solution

The fourth proportional to 12,211.75, 18,317.63 and 5,286.25 is: 7,929.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,211.75 : 18,317.63 = 5,286.25 : x
  2. Step 2: Convert to fraction form
    12,211.75/18,317.63 = 5,286.25/x
  3. Step 3: Cross multiply
    12,211.75x = 18,317.63 × 5,286.25
  4. Step 4: Simplify right side
    12,211.75x = 96,831,571.59
  5. Step 5: Solve for x
    x = 96,831,571.59/12,211.75
  6. Step 6: Final answer
    x = 7,929.38

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Double scale
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Similar ratio
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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.