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Finding the Fourth Proportional to 6,611.64, 9,908.15 and 5,218.85

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Solution

The fourth proportional to 6,611.64, 9,908.15 and 5,218.85 is: 7,820.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,611.64 : 9,908.15 = 5,218.85 : x
  2. Step 2: Convert to fraction form
    6,611.64/9,908.15 = 5,218.85/x
  3. Step 3: Cross multiply
    6,611.64x = 9,908.15 × 5,218.85
  4. Step 4: Simplify right side
    6,611.64x = 51,709,072.99
  5. Step 5: Solve for x
    x = 51,709,072.99/6,611.64
  6. Step 6: Final answer
    x = 7,820.91

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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.