Home / 26,912.88-40,370.40-12,121.20

Finding the Fourth Proportional to 26,912.88, 40,370.40 and 12,121.20

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Solution

The fourth proportional to 26,912.88, 40,370.40 and 12,121.20 is: 18,182.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,912.88 : 40,370.40 = 12,121.20 : x
  2. Step 2: Convert to fraction form
    26,912.88/40,370.40 = 12,121.20/x
  3. Step 3: Cross multiply
    26,912.88x = 40,370.40 × 12,121.20
  4. Step 4: Simplify right side
    26,912.88x = 489,337,692.48
  5. Step 5: Solve for x
    x = 489,337,692.48/26,912.88
  6. Step 6: Final answer
    x = 18,182.29

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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.