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Finding the Fourth Proportional to 20,530.55, 30,797.80 and 5,739.45

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Solution

The fourth proportional to 20,530.55, 30,797.80 and 5,739.45 is: 8,609.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,530.55 : 30,797.80 = 5,739.45 : x
  2. Step 2: Convert to fraction form
    20,530.55/30,797.80 = 5,739.45/x
  3. Step 3: Cross multiply
    20,530.55x = 30,797.80 × 5,739.45
  4. Step 4: Simplify right side
    20,530.55x = 176,762,433.21
  5. Step 5: Solve for x
    x = 176,762,433.21/20,530.55
  6. Step 6: Final answer
    x = 8,609.73

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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.