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Finding the Fourth Proportional to 20,409.74, 30,611.73 and 6,366.50

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Solution

The fourth proportional to 20,409.74, 30,611.73 and 6,366.50 is: 9,548.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,409.74 : 30,611.73 = 6,366.50 : x
  2. Step 2: Convert to fraction form
    20,409.74/30,611.73 = 6,366.50/x
  3. Step 3: Cross multiply
    20,409.74x = 30,611.73 × 6,366.50
  4. Step 4: Simplify right side
    20,409.74x = 194,889,579.05
  5. Step 5: Solve for x
    x = 194,889,579.05/20,409.74
  6. Step 6: Final answer
    x = 9,548.85

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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.