Home / 21,021.12-31,540.86-11,158.02

Finding the Fourth Proportional to 21,021.12, 31,540.86 and 11,158.02

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Solution

The fourth proportional to 21,021.12, 31,540.86 and 11,158.02 is: 16,741.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021.12 : 31,540.86 = 11,158.02 : x
  2. Step 2: Convert to fraction form
    21,021.12/31,540.86 = 11,158.02/x
  3. Step 3: Cross multiply
    21,021.12x = 31,540.86 × 11,158.02
  4. Step 4: Simplify right side
    21,021.12x = 351,933,546.70
  5. Step 5: Solve for x
    x = 351,933,546.70/21,021.12
  6. Step 6: Final answer
    x = 16,741.90

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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.