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Finding the Fourth Proportional to 8,611.76, 12,917.32 and 4,740.48

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Solution

The fourth proportional to 8,611.76, 12,917.32 and 4,740.48 is: 7,110.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,611.76 : 12,917.32 = 4,740.48 : x
  2. Step 2: Convert to fraction form
    8,611.76/12,917.32 = 4,740.48/x
  3. Step 3: Cross multiply
    8,611.76x = 12,917.32 × 4,740.48
  4. Step 4: Simplify right side
    8,611.76x = 61,234,297.11
  5. Step 5: Solve for x
    x = 61,234,297.11/8,611.76
  6. Step 6: Final answer
    x = 7,110.54

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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.