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Finding the Fourth Proportional to 18,676.98, 28,023.67 and 9,912.58

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Solution

The fourth proportional to 18,676.98, 28,023.67 and 9,912.58 is: 14,873.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,676.98 : 28,023.67 = 9,912.58 : x
  2. Step 2: Convert to fraction form
    18,676.98/28,023.67 = 9,912.58/x
  3. Step 3: Cross multiply
    18,676.98x = 28,023.67 × 9,912.58
  4. Step 4: Simplify right side
    18,676.98x = 277,786,813.10
  5. Step 5: Solve for x
    x = 277,786,813.10/18,676.98
  6. Step 6: Final answer
    x = 14,873.22

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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.