Home / 21,391.92-32,137.20-12,633.12

Finding the Fourth Proportional to 21,391.92, 32,137.20 and 12,633.12

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Solution

The fourth proportional to 21,391.92, 32,137.20 and 12,633.12 is: 18,978.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,391.92 : 32,137.20 = 12,633.12 : x
  2. Step 2: Convert to fraction form
    21,391.92/32,137.20 = 12,633.12/x
  3. Step 3: Cross multiply
    21,391.92x = 32,137.20 × 12,633.12
  4. Step 4: Simplify right side
    21,391.92x = 405,993,104.06
  5. Step 5: Solve for x
    x = 405,993,104.06/21,391.92
  6. Step 6: Final answer
    x = 18,978.81

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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.