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Finding the Fourth Proportional to 20,660.46, 30,992.74 and 6,616.98

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Solution

The fourth proportional to 20,660.46, 30,992.74 and 6,616.98 is: 9,926.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.46 : 30,992.74 = 6,616.98 : x
  2. Step 2: Convert to fraction form
    20,660.46/30,992.74 = 6,616.98/x
  3. Step 3: Cross multiply
    20,660.46x = 30,992.74 × 6,616.98
  4. Step 4: Simplify right side
    20,660.46x = 205,078,340.73
  5. Step 5: Solve for x
    x = 205,078,340.73/20,660.46
  6. Step 6: Final answer
    x = 9,926.13

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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.