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Finding the Fourth Proportional to 12,671.73, 18,974.79 and 11,261.16

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Solution

The fourth proportional to 12,671.73, 18,974.79 and 11,261.16 is: 16,862.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,671.73 : 18,974.79 = 11,261.16 : x
  2. Step 2: Convert to fraction form
    12,671.73/18,974.79 = 11,261.16/x
  3. Step 3: Cross multiply
    12,671.73x = 18,974.79 × 11,261.16
  4. Step 4: Simplify right side
    12,671.73x = 213,678,146.16
  5. Step 5: Solve for x
    x = 213,678,146.16/12,671.73
  6. Step 6: Final answer
    x = 16,862.59

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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.