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Finding the Fourth Proportional to 18,676.76, 28,012.92 and 6,986.84

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Solution

The fourth proportional to 18,676.76, 28,012.92 and 6,986.84 is: 10,479.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,676.76 : 28,012.92 = 6,986.84 : x
  2. Step 2: Convert to fraction form
    18,676.76/28,012.92 = 6,986.84/x
  3. Step 3: Cross multiply
    18,676.76x = 28,012.92 × 6,986.84
  4. Step 4: Simplify right side
    18,676.76x = 195,721,789.97
  5. Step 5: Solve for x
    x = 195,721,789.97/18,676.76
  6. Step 6: Final answer
    x = 10,479.43

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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.