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Finding the Fourth Proportional to 8,718, 13,076.40 and 2,874.48

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Solution

The fourth proportional to 8,718, 13,076.40 and 2,874.48 is: 4,311.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718 : 13,076.40 = 2,874.48 : x
  2. Step 2: Convert to fraction form
    8,718/13,076.40 = 2,874.48/x
  3. Step 3: Cross multiply
    8,718x = 13,076.40 × 2,874.48
  4. Step 4: Simplify right side
    8,718x = 37,587,850.27
  5. Step 5: Solve for x
    x = 37,587,850.27/8,718
  6. Step 6: Final answer
    x = 4,311.52

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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.