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Finding the Fourth Proportional to 13,379.20, 20,068.80 and 9,404.80

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Solution

The fourth proportional to 13,379.20, 20,068.80 and 9,404.80 is: 14,107.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,379.20 : 20,068.80 = 9,404.80 : x
  2. Step 2: Convert to fraction form
    13,379.20/20,068.80 = 9,404.80/x
  3. Step 3: Cross multiply
    13,379.20x = 20,068.80 × 9,404.80
  4. Step 4: Simplify right side
    13,379.20x = 188,743,050.24
  5. Step 5: Solve for x
    x = 188,743,050.24/13,379.20
  6. Step 6: Final answer
    x = 14,107.20

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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.