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Finding the Fourth Proportional to 20,105.20, 30,190.20 and 13,560.40

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Solution

The fourth proportional to 20,105.20, 30,190.20 and 13,560.40 is: 20,362.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,105.20 : 30,190.20 = 13,560.40 : x
  2. Step 2: Convert to fraction form
    20,105.20/30,190.20 = 13,560.40/x
  3. Step 3: Cross multiply
    20,105.20x = 30,190.20 × 13,560.40
  4. Step 4: Simplify right side
    20,105.20x = 409,391,188.08
  5. Step 5: Solve for x
    x = 409,391,188.08/20,105.20
  6. Step 6: Final answer
    x = 20,362.45

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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.