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Finding the Fourth Proportional to 20,617.92, 30,929.91 and 7,467.21

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Solution

The fourth proportional to 20,617.92, 30,929.91 and 7,467.21 is: 11,201.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,617.92 : 30,929.91 = 7,467.21 : x
  2. Step 2: Convert to fraction form
    20,617.92/30,929.91 = 7,467.21/x
  3. Step 3: Cross multiply
    20,617.92x = 30,929.91 × 7,467.21
  4. Step 4: Simplify right side
    20,617.92x = 230,960,133.25
  5. Step 5: Solve for x
    x = 230,960,133.25/20,617.92
  6. Step 6: Final answer
    x = 11,201.91

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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.