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Finding the Fourth Proportional to 8,407.78, 12,611.67 and 3,964.41

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Solution

The fourth proportional to 8,407.78, 12,611.67 and 3,964.41 is: 5,946.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,407.78 : 12,611.67 = 3,964.41 : x
  2. Step 2: Convert to fraction form
    8,407.78/12,611.67 = 3,964.41/x
  3. Step 3: Cross multiply
    8,407.78x = 12,611.67 × 3,964.41
  4. Step 4: Simplify right side
    8,407.78x = 49,997,779.31
  5. Step 5: Solve for x
    x = 49,997,779.31/8,407.78
  6. Step 6: Final answer
    x = 5,946.61

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Similar ratio
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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.