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Finding the Fourth Proportional to 22,307.94, 30,785.39 and 12,235.78

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Solution

The fourth proportional to 22,307.94, 30,785.39 and 12,235.78 is: 16,885.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,307.94 : 30,785.39 = 12,235.78 : x
  2. Step 2: Convert to fraction form
    22,307.94/30,785.39 = 12,235.78/x
  3. Step 3: Cross multiply
    22,307.94x = 30,785.39 × 12,235.78
  4. Step 4: Simplify right side
    22,307.94x = 376,683,403.44
  5. Step 5: Solve for x
    x = 376,683,403.44/22,307.94
  6. Step 6: Final answer
    x = 16,885.62

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Double scale
Find fourth proportional to 22,308.94, 30,786.77 and 12,236.78
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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.