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Finding the Fourth Proportional to 12,912.48, 17,826.48 and 12,121.92

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Solution

The fourth proportional to 12,912.48, 17,826.48 and 12,121.92 is: 16,735.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,912.48 : 17,826.48 = 12,121.92 : x
  2. Step 2: Convert to fraction form
    12,912.48/17,826.48 = 12,121.92/x
  3. Step 3: Cross multiply
    12,912.48x = 17,826.48 × 12,121.92
  4. Step 4: Simplify right side
    12,912.48x = 216,091,164.44
  5. Step 5: Solve for x
    x = 216,091,164.44/12,912.48
  6. Step 6: Final answer
    x = 16,735.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.