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Finding the Fourth Proportional to 8,611.68, 12,919.50 and 2,455.68

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Solution

The fourth proportional to 8,611.68, 12,919.50 and 2,455.68 is: 3,684.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,611.68 : 12,919.50 = 2,455.68 : x
  2. Step 2: Convert to fraction form
    8,611.68/12,919.50 = 2,455.68/x
  3. Step 3: Cross multiply
    8,611.68x = 12,919.50 × 2,455.68
  4. Step 4: Simplify right side
    8,611.68x = 31,726,157.76
  5. Step 5: Solve for x
    x = 31,726,157.76/8,611.68
  6. Step 6: Final answer
    x = 3,684.08

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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.