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Finding the Fourth Proportional to 12,013.80, 18,110.82 and 11,211

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Solution

The fourth proportional to 12,013.80, 18,110.82 and 11,211 is: 16,900.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,013.80 : 18,110.82 = 11,211 : x
  2. Step 2: Convert to fraction form
    12,013.80/18,110.82 = 11,211/x
  3. Step 3: Cross multiply
    12,013.80x = 18,110.82 × 11,211
  4. Step 4: Simplify right side
    12,013.80x = 203,040,403.02
  5. Step 5: Solve for x
    x = 203,040,403.02/12,013.80
  6. Step 6: Final answer
    x = 16,900.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.