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Finding the Fourth Proportional to 20,190.65, 30,290.85 and 6,339.65

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Solution

The fourth proportional to 20,190.65, 30,290.85 and 6,339.65 is: 9,511.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,190.65 : 30,290.85 = 6,339.65 : x
  2. Step 2: Convert to fraction form
    20,190.65/30,290.85 = 6,339.65/x
  3. Step 3: Cross multiply
    20,190.65x = 30,290.85 × 6,339.65
  4. Step 4: Simplify right side
    20,190.65x = 192,033,235.75
  5. Step 5: Solve for x
    x = 192,033,235.75/20,190.65
  6. Step 6: Final answer
    x = 9,511.00

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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.