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Finding the Fourth Proportional to 8,611.30, 11,879.22 and 5,070.88

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Solution

The fourth proportional to 8,611.30, 11,879.22 and 5,070.88 is: 6,995.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,611.30 : 11,879.22 = 5,070.88 : x
  2. Step 2: Convert to fraction form
    8,611.30/11,879.22 = 5,070.88/x
  3. Step 3: Cross multiply
    8,611.30x = 11,879.22 × 5,070.88
  4. Step 4: Simplify right side
    8,611.30x = 60,238,099.11
  5. Step 5: Solve for x
    x = 60,238,099.11/8,611.30
  6. Step 6: Final answer
    x = 6,995.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.