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Finding the Fourth Proportional to 12,453.75, 18,683.59 and 4,245.75

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Solution

The fourth proportional to 12,453.75, 18,683.59 and 4,245.75 is: 6,369.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,453.75 : 18,683.59 = 4,245.75 : x
  2. Step 2: Convert to fraction form
    12,453.75/18,683.59 = 4,245.75/x
  3. Step 3: Cross multiply
    12,453.75x = 18,683.59 × 4,245.75
  4. Step 4: Simplify right side
    12,453.75x = 79,325,831.01
  5. Step 5: Solve for x
    x = 79,325,831.01/12,453.75
  6. Step 6: Final answer
    x = 6,369.63

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Half scale
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Double scale
Find fourth proportional to 12,454.75, 18,685.09 and 4,246.75
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.