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Finding the Fourth Proportional to 18,961.74, 28,447.08 and 6,481.89

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Solution

The fourth proportional to 18,961.74, 28,447.08 and 6,481.89 is: 9,724.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,961.74 : 28,447.08 = 6,481.89 : x
  2. Step 2: Convert to fraction form
    18,961.74/28,447.08 = 6,481.89/x
  3. Step 3: Cross multiply
    18,961.74x = 28,447.08 × 6,481.89
  4. Step 4: Simplify right side
    18,961.74x = 184,390,843.38
  5. Step 5: Solve for x
    x = 184,390,843.38/18,961.74
  6. Step 6: Final answer
    x = 9,724.36

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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.