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Finding the Fourth Proportional to 8,658.69, 12,975.89 and 3,724.62

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Solution

The fourth proportional to 8,658.69, 12,975.89 and 3,724.62 is: 5,581.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,658.69 : 12,975.89 = 3,724.62 : x
  2. Step 2: Convert to fraction form
    8,658.69/12,975.89 = 3,724.62/x
  3. Step 3: Cross multiply
    8,658.69x = 12,975.89 × 3,724.62
  4. Step 4: Simplify right side
    8,658.69x = 48,330,240.79
  5. Step 5: Solve for x
    x = 48,330,240.79/8,658.69
  6. Step 6: Final answer
    x = 5,581.70

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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.