Home / 21,316.88-31,979.95-8,169.27

Finding the Fourth Proportional to 21,316.88, 31,979.95 and 8,169.27

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Solution

The fourth proportional to 21,316.88, 31,979.95 and 8,169.27 is: 12,255.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,316.88 : 31,979.95 = 8,169.27 : x
  2. Step 2: Convert to fraction form
    21,316.88/31,979.95 = 8,169.27/x
  3. Step 3: Cross multiply
    21,316.88x = 31,979.95 × 8,169.27
  4. Step 4: Simplify right side
    21,316.88x = 261,252,705.79
  5. Step 5: Solve for x
    x = 261,252,705.79/21,316.88
  6. Step 6: Final answer
    x = 12,255.67

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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.