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Finding the Fourth Proportional to 20,647.37, 30,972.22 and 5,855.11

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Solution

The fourth proportional to 20,647.37, 30,972.22 and 5,855.11 is: 8,782.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,647.37 : 30,972.22 = 5,855.11 : x
  2. Step 2: Convert to fraction form
    20,647.37/30,972.22 = 5,855.11/x
  3. Step 3: Cross multiply
    20,647.37x = 30,972.22 × 5,855.11
  4. Step 4: Simplify right side
    20,647.37x = 181,345,662.98
  5. Step 5: Solve for x
    x = 181,345,662.98/20,647.37
  6. Step 6: Final answer
    x = 8,782.99

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1.5x scale

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.