Home / 20,949.85-31,416.53-7,619.68

Finding the Fourth Proportional to 20,949.85, 31,416.53 and 7,619.68

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Solution

The fourth proportional to 20,949.85, 31,416.53 and 7,619.68 is: 11,426.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,949.85 : 31,416.53 = 7,619.68 : x
  2. Step 2: Convert to fraction form
    20,949.85/31,416.53 = 7,619.68/x
  3. Step 3: Cross multiply
    20,949.85x = 31,416.53 × 7,619.68
  4. Step 4: Simplify right side
    20,949.85x = 239,383,748.23
  5. Step 5: Solve for x
    x = 239,383,748.23/20,949.85
  6. Step 6: Final answer
    x = 11,426.52

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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.