Home / 20,578.11-30,861.06-8,731.72

Finding the Fourth Proportional to 20,578.11, 30,861.06 and 8,731.72

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Solution

The fourth proportional to 20,578.11, 30,861.06 and 8,731.72 is: 13,094.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,578.11 : 30,861.06 = 8,731.72 : x
  2. Step 2: Convert to fraction form
    20,578.11/30,861.06 = 8,731.72/x
  3. Step 3: Cross multiply
    20,578.11x = 30,861.06 × 8,731.72
  4. Step 4: Simplify right side
    20,578.11x = 269,470,134.82
  5. Step 5: Solve for x
    x = 269,470,134.82/20,578.11
  6. Step 6: Final answer
    x = 13,094.99

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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.