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Finding the Fourth Proportional to 6,404.13, 9,605.86 and 1,961.80

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Solution

The fourth proportional to 6,404.13, 9,605.86 and 1,961.80 is: 2,942.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,404.13 : 9,605.86 = 1,961.80 : x
  2. Step 2: Convert to fraction form
    6,404.13/9,605.86 = 1,961.80/x
  3. Step 3: Cross multiply
    6,404.13x = 9,605.86 × 1,961.80
  4. Step 4: Simplify right side
    6,404.13x = 18,844,776.15
  5. Step 5: Solve for x
    x = 18,844,776.15/6,404.13
  6. Step 6: Final answer
    x = 2,942.60

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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.