Home / 21,191.19-31,786.79-8,040.44

Finding the Fourth Proportional to 21,191.19, 31,786.79 and 8,040.44

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Solution

The fourth proportional to 21,191.19, 31,786.79 and 8,040.44 is: 12,060.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,191.19 : 31,786.79 = 8,040.44 : x
  2. Step 2: Convert to fraction form
    21,191.19/31,786.79 = 8,040.44/x
  3. Step 3: Cross multiply
    21,191.19x = 31,786.79 × 8,040.44
  4. Step 4: Simplify right side
    21,191.19x = 255,579,578.65
  5. Step 5: Solve for x
    x = 255,579,578.65/21,191.19
  6. Step 6: Final answer
    x = 12,060.65

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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.