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Finding the Fourth Proportional to 17,721.67, 26,578.87 and 8,357.67

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Solution

The fourth proportional to 17,721.67, 26,578.87 and 8,357.67 is: 12,534.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,721.67 : 26,578.87 = 8,357.67 : x
  2. Step 2: Convert to fraction form
    17,721.67/26,578.87 = 8,357.67/x
  3. Step 3: Cross multiply
    17,721.67x = 26,578.87 × 8,357.67
  4. Step 4: Simplify right side
    17,721.67x = 222,137,424.43
  5. Step 5: Solve for x
    x = 222,137,424.43/17,721.67
  6. Step 6: Final answer
    x = 12,534.79

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1.5x scale

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.