Home / 8,721.98-13,078.87-3,171.41

Finding the Fourth Proportional to 8,721.98, 13,078.87 and 3,171.41

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Solution

The fourth proportional to 8,721.98, 13,078.87 and 3,171.41 is: 4,755.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,721.98 : 13,078.87 = 3,171.41 : x
  2. Step 2: Convert to fraction form
    8,721.98/13,078.87 = 3,171.41/x
  3. Step 3: Cross multiply
    8,721.98x = 13,078.87 × 3,171.41
  4. Step 4: Simplify right side
    8,721.98x = 41,478,459.11
  5. Step 5: Solve for x
    x = 41,478,459.11/8,721.98
  6. Step 6: Final answer
    x = 4,755.62

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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.