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Finding the Fourth Proportional to 20,374.44, 30,555.72 and 7,891.68

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Solution

The fourth proportional to 20,374.44, 30,555.72 and 7,891.68 is: 11,835.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,374.44 : 30,555.72 = 7,891.68 : x
  2. Step 2: Convert to fraction form
    20,374.44/30,555.72 = 7,891.68/x
  3. Step 3: Cross multiply
    20,374.44x = 30,555.72 × 7,891.68
  4. Step 4: Simplify right side
    20,374.44x = 241,135,811.63
  5. Step 5: Solve for x
    x = 241,135,811.63/20,374.44
  6. Step 6: Final answer
    x = 11,835.21

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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.