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Finding the Fourth Proportional to 20,405.93, 30,611.62 and 6,366.90

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Solution

The fourth proportional to 20,405.93, 30,611.62 and 6,366.90 is: 9,551.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,405.93 : 30,611.62 = 6,366.90 : x
  2. Step 2: Convert to fraction form
    20,405.93/30,611.62 = 6,366.90/x
  3. Step 3: Cross multiply
    20,405.93x = 30,611.62 × 6,366.90
  4. Step 4: Simplify right side
    20,405.93x = 194,901,246.13
  5. Step 5: Solve for x
    x = 194,901,246.13/20,405.93
  6. Step 6: Final answer
    x = 9,551.21

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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.