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Finding the Fourth Proportional to 8,685.54, 11,986.02 and 4,706.66

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Solution

The fourth proportional to 8,685.54, 11,986.02 and 4,706.66 is: 6,495.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,685.54 : 11,986.02 = 4,706.66 : x
  2. Step 2: Convert to fraction form
    8,685.54/11,986.02 = 4,706.66/x
  3. Step 3: Cross multiply
    8,685.54x = 11,986.02 × 4,706.66
  4. Step 4: Simplify right side
    8,685.54x = 56,414,120.89
  5. Step 5: Solve for x
    x = 56,414,120.89/8,685.54
  6. Step 6: Final answer
    x = 6,495.18

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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.