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Finding the Fourth Proportional to 22,379.80, 33,540.90 and 13,605.40

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Solution

The fourth proportional to 22,379.80, 33,540.90 and 13,605.40 is: 20,390.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,379.80 : 33,540.90 = 13,605.40 : x
  2. Step 2: Convert to fraction form
    22,379.80/33,540.90 = 13,605.40/x
  3. Step 3: Cross multiply
    22,379.80x = 33,540.90 × 13,605.40
  4. Step 4: Simplify right side
    22,379.80x = 456,337,360.86
  5. Step 5: Solve for x
    x = 456,337,360.86/22,379.80
  6. Step 6: Final answer
    x = 20,390.59

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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.