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Finding the Fourth Proportional to 13,404.15, 20,100.15 and 5,081.40

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Solution

The fourth proportional to 13,404.15, 20,100.15 and 5,081.40 is: 7,619.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,404.15 : 20,100.15 = 5,081.40 : x
  2. Step 2: Convert to fraction form
    13,404.15/20,100.15 = 5,081.40/x
  3. Step 3: Cross multiply
    13,404.15x = 20,100.15 × 5,081.40
  4. Step 4: Simplify right side
    13,404.15x = 102,136,902.21
  5. Step 5: Solve for x
    x = 102,136,902.21/13,404.15
  6. Step 6: Final answer
    x = 7,619.80

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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.