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Finding the Fourth Proportional to 12,654.82, 18,948.21 and 8,261.38

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Solution

The fourth proportional to 12,654.82, 18,948.21 and 8,261.38 is: 12,369.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,654.82 : 18,948.21 = 8,261.38 : x
  2. Step 2: Convert to fraction form
    12,654.82/18,948.21 = 8,261.38/x
  3. Step 3: Cross multiply
    12,654.82x = 18,948.21 × 8,261.38
  4. Step 4: Simplify right side
    12,654.82x = 156,538,363.13
  5. Step 5: Solve for x
    x = 156,538,363.13/12,654.82
  6. Step 6: Final answer
    x = 12,369.86

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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.