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Finding the Fourth Proportional to 6,611.16, 9,918.90 and 5,155.32

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Solution

The fourth proportional to 6,611.16, 9,918.90 and 5,155.32 is: 7,734.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,611.16 : 9,918.90 = 5,155.32 : x
  2. Step 2: Convert to fraction form
    6,611.16/9,918.90 = 5,155.32/x
  3. Step 3: Cross multiply
    6,611.16x = 9,918.90 × 5,155.32
  4. Step 4: Simplify right side
    6,611.16x = 51,135,103.55
  5. Step 5: Solve for x
    x = 51,135,103.55/6,611.16
  6. Step 6: Final answer
    x = 7,734.66

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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.