Home / 21,406.20-29,540.64-11,974.75

Finding the Fourth Proportional to 21,406.20, 29,540.64 and 11,974.75

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Solution

The fourth proportional to 21,406.20, 29,540.64 and 11,974.75 is: 16,525.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,406.20 : 29,540.64 = 11,974.75 : x
  2. Step 2: Convert to fraction form
    21,406.20/29,540.64 = 11,974.75/x
  3. Step 3: Cross multiply
    21,406.20x = 29,540.64 × 11,974.75
  4. Step 4: Simplify right side
    21,406.20x = 353,741,778.84
  5. Step 5: Solve for x
    x = 353,741,778.84/21,406.20
  6. Step 6: Final answer
    x = 16,525.20

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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.