Home / 21,245.90-31,992.30-15,738.30

Finding the Fourth Proportional to 21,245.90, 31,992.30 and 15,738.30

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Solution

The fourth proportional to 21,245.90, 31,992.30 and 15,738.30 is: 23,698.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,245.90 : 31,992.30 = 15,738.30 : x
  2. Step 2: Convert to fraction form
    21,245.90/31,992.30 = 15,738.30/x
  3. Step 3: Cross multiply
    21,245.90x = 31,992.30 × 15,738.30
  4. Step 4: Simplify right side
    21,245.90x = 503,504,415.09
  5. Step 5: Solve for x
    x = 503,504,415.09/21,245.90
  6. Step 6: Final answer
    x = 23,698.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.