Home / 18,581.40-27,874.82-8,721.68

Finding the Fourth Proportional to 18,581.40, 27,874.82 and 8,721.68

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Solution

The fourth proportional to 18,581.40, 27,874.82 and 8,721.68 is: 13,083.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,581.40 : 27,874.82 = 8,721.68 : x
  2. Step 2: Convert to fraction form
    18,581.40/27,874.82 = 8,721.68/x
  3. Step 3: Cross multiply
    18,581.40x = 27,874.82 × 8,721.68
  4. Step 4: Simplify right side
    18,581.40x = 243,115,260.10
  5. Step 5: Solve for x
    x = 243,115,260.10/18,581.40
  6. Step 6: Final answer
    x = 13,083.80

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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.