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Finding the Fourth Proportional to 8,611.40, 12,916.62 and 2,767.55

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Solution

The fourth proportional to 8,611.40, 12,916.62 and 2,767.55 is: 4,151.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,611.40 : 12,916.62 = 2,767.55 : x
  2. Step 2: Convert to fraction form
    8,611.40/12,916.62 = 2,767.55/x
  3. Step 3: Cross multiply
    8,611.40x = 12,916.62 × 2,767.55
  4. Step 4: Simplify right side
    8,611.40x = 35,747,327.10
  5. Step 5: Solve for x
    x = 35,747,327.10/8,611.40
  6. Step 6: Final answer
    x = 4,151.16

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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.