Home / 20,561.20-30,856.20-13,183.60

Finding the Fourth Proportional to 20,561.20, 30,856.20 and 13,183.60

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Solution

The fourth proportional to 20,561.20, 30,856.20 and 13,183.60 is: 19,784.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,561.20 : 30,856.20 = 13,183.60 : x
  2. Step 2: Convert to fraction form
    20,561.20/30,856.20 = 13,183.60/x
  3. Step 3: Cross multiply
    20,561.20x = 30,856.20 × 13,183.60
  4. Step 4: Simplify right side
    20,561.20x = 406,795,798.32
  5. Step 5: Solve for x
    x = 406,795,798.32/20,561.20
  6. Step 6: Final answer
    x = 19,784.63

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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.