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Finding the Fourth Proportional to 8,611.77, 11,889.08 and 5,630.61

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Solution

The fourth proportional to 8,611.77, 11,889.08 and 5,630.61 is: 7,773.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,611.77 : 11,889.08 = 5,630.61 : x
  2. Step 2: Convert to fraction form
    8,611.77/11,889.08 = 5,630.61/x
  3. Step 3: Cross multiply
    8,611.77x = 11,889.08 × 5,630.61
  4. Step 4: Simplify right side
    8,611.77x = 66,942,810.28
  5. Step 5: Solve for x
    x = 66,942,810.28/8,611.77
  6. Step 6: Final answer
    x = 7,773.41

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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.