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Finding the Fourth Proportional to 8,706.59, 13,059.85 and 3,159.92

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Solution

The fourth proportional to 8,706.59, 13,059.85 and 3,159.92 is: 4,739.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,706.59 : 13,059.85 = 3,159.92 : x
  2. Step 2: Convert to fraction form
    8,706.59/13,059.85 = 3,159.92/x
  3. Step 3: Cross multiply
    8,706.59x = 13,059.85 × 3,159.92
  4. Step 4: Simplify right side
    8,706.59x = 41,268,065.41
  5. Step 5: Solve for x
    x = 41,268,065.41/8,706.59
  6. Step 6: Final answer
    x = 4,739.87

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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.