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Finding the Fourth Proportional to 12,611.52, 18,919.71 and 7,071.12

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Solution

The fourth proportional to 12,611.52, 18,919.71 and 7,071.12 is: 10,608.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,611.52 : 18,919.71 = 7,071.12 : x
  2. Step 2: Convert to fraction form
    12,611.52/18,919.71 = 7,071.12/x
  3. Step 3: Cross multiply
    12,611.52x = 18,919.71 × 7,071.12
  4. Step 4: Simplify right side
    12,611.52x = 133,783,539.78
  5. Step 5: Solve for x
    x = 133,783,539.78/12,611.52
  6. Step 6: Final answer
    x = 10,608.04

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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.