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Finding the Fourth Proportional to 20,403.99, 30,584.39 and 11,620.08

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Solution

The fourth proportional to 20,403.99, 30,584.39 and 11,620.08 is: 17,417.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,403.99 : 30,584.39 = 11,620.08 : x
  2. Step 2: Convert to fraction form
    20,403.99/30,584.39 = 11,620.08/x
  3. Step 3: Cross multiply
    20,403.99x = 30,584.39 × 11,620.08
  4. Step 4: Simplify right side
    20,403.99x = 355,393,000.45
  5. Step 5: Solve for x
    x = 355,393,000.45/20,403.99
  6. Step 6: Final answer
    x = 17,417.82

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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.