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Finding the Fourth Proportional to 20,449.80, 30,674.61 and 5,658.57

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Solution

The fourth proportional to 20,449.80, 30,674.61 and 5,658.57 is: 8,487.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,449.80 : 30,674.61 = 5,658.57 : x
  2. Step 2: Convert to fraction form
    20,449.80/30,674.61 = 5,658.57/x
  3. Step 3: Cross multiply
    20,449.80x = 30,674.61 × 5,658.57
  4. Step 4: Simplify right side
    20,449.80x = 173,574,427.91
  5. Step 5: Solve for x
    x = 173,574,427.91/20,449.80
  6. Step 6: Final answer
    x = 8,487.83

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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.