Home / 21,979.26-32,981.85-8,137.98

Finding the Fourth Proportional to 21,979.26, 32,981.85 and 8,137.98

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Solution

The fourth proportional to 21,979.26, 32,981.85 and 8,137.98 is: 12,211.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,979.26 : 32,981.85 = 8,137.98 : x
  2. Step 2: Convert to fraction form
    21,979.26/32,981.85 = 8,137.98/x
  3. Step 3: Cross multiply
    21,979.26x = 32,981.85 × 8,137.98
  4. Step 4: Simplify right side
    21,979.26x = 268,405,635.66
  5. Step 5: Solve for x
    x = 268,405,635.66/21,979.26
  6. Step 6: Final answer
    x = 12,211.77

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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.