Home / 21,322.48-31,986.04-8,186

Finding the Fourth Proportional to 21,322.48, 31,986.04 and 8,186

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Solution

The fourth proportional to 21,322.48, 31,986.04 and 8,186 is: 12,279.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,322.48 : 31,986.04 = 8,186 : x
  2. Step 2: Convert to fraction form
    21,322.48/31,986.04 = 8,186/x
  3. Step 3: Cross multiply
    21,322.48x = 31,986.04 × 8,186
  4. Step 4: Simplify right side
    21,322.48x = 261,837,723.44
  5. Step 5: Solve for x
    x = 261,837,723.44/21,322.48
  6. Step 6: Final answer
    x = 12,279.89

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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.