Home / 21,194.85-31,786.95-8,718.33

Finding the Fourth Proportional to 21,194.85, 31,786.95 and 8,718.33

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Solution

The fourth proportional to 21,194.85, 31,786.95 and 8,718.33 is: 13,075.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,194.85 : 31,786.95 = 8,718.33 : x
  2. Step 2: Convert to fraction form
    21,194.85/31,786.95 = 8,718.33/x
  3. Step 3: Cross multiply
    21,194.85x = 31,786.95 × 8,718.33
  4. Step 4: Simplify right side
    21,194.85x = 277,129,119.79
  5. Step 5: Solve for x
    x = 277,129,119.79/21,194.85
  6. Step 6: Final answer
    x = 13,075.30

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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.