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Finding the Fourth Proportional to 6,611.12, 9,916.68 and 2,718.80

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Solution

The fourth proportional to 6,611.12, 9,916.68 and 2,718.80 is: 4,078.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,611.12 : 9,916.68 = 2,718.80 : x
  2. Step 2: Convert to fraction form
    6,611.12/9,916.68 = 2,718.80/x
  3. Step 3: Cross multiply
    6,611.12x = 9,916.68 × 2,718.80
  4. Step 4: Simplify right side
    6,611.12x = 26,961,469.58
  5. Step 5: Solve for x
    x = 26,961,469.58/6,611.12
  6. Step 6: Final answer
    x = 4,078.20

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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.