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Finding the Fourth Proportional to 20,467.77, 30,713.44 and 8,620.62

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Solution

The fourth proportional to 20,467.77, 30,713.44 and 8,620.62 is: 12,935.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,467.77 : 30,713.44 = 8,620.62 : x
  2. Step 2: Convert to fraction form
    20,467.77/30,713.44 = 8,620.62/x
  3. Step 3: Cross multiply
    20,467.77x = 30,713.44 × 8,620.62
  4. Step 4: Simplify right side
    20,467.77x = 264,768,895.13
  5. Step 5: Solve for x
    x = 264,768,895.13/20,467.77
  6. Step 6: Final answer
    x = 12,935.89

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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.