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Finding the Fourth Proportional to 20,539.44, 30,811.05 and 9,449.19

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Solution

The fourth proportional to 20,539.44, 30,811.05 and 9,449.19 is: 14,174.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,539.44 : 30,811.05 = 9,449.19 : x
  2. Step 2: Convert to fraction form
    20,539.44/30,811.05 = 9,449.19/x
  3. Step 3: Cross multiply
    20,539.44x = 30,811.05 × 9,449.19
  4. Step 4: Simplify right side
    20,539.44x = 291,139,465.55
  5. Step 5: Solve for x
    x = 291,139,465.55/20,539.44
  6. Step 6: Final answer
    x = 14,174.65

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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.