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Finding the Fourth Proportional to 8,658.74, 12,980.82 and 3,461.78

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Solution

The fourth proportional to 8,658.74, 12,980.82 and 3,461.78 is: 5,189.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,658.74 : 12,980.82 = 3,461.78 : x
  2. Step 2: Convert to fraction form
    8,658.74/12,980.82 = 3,461.78/x
  3. Step 3: Cross multiply
    8,658.74x = 12,980.82 × 3,461.78
  4. Step 4: Simplify right side
    8,658.74x = 44,936,743.06
  5. Step 5: Solve for x
    x = 44,936,743.06/8,658.74
  6. Step 6: Final answer
    x = 5,189.76

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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.