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Finding the Fourth Proportional to 18,638.44, 27,968.82 and 6,959.86

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Solution

The fourth proportional to 18,638.44, 27,968.82 and 6,959.86 is: 10,443.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,638.44 : 27,968.82 = 6,959.86 : x
  2. Step 2: Convert to fraction form
    18,638.44/27,968.82 = 6,959.86/x
  3. Step 3: Cross multiply
    18,638.44x = 27,968.82 × 6,959.86
  4. Step 4: Simplify right side
    18,638.44x = 194,659,071.57
  5. Step 5: Solve for x
    x = 194,659,071.57/18,638.44
  6. Step 6: Final answer
    x = 10,443.96

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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.