Home / 20,171.20-30,285.60-11,423.20

Finding the Fourth Proportional to 20,171.20, 30,285.60 and 11,423.20

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Solution

The fourth proportional to 20,171.20, 30,285.60 and 11,423.20 is: 17,151.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,171.20 : 30,285.60 = 11,423.20 : x
  2. Step 2: Convert to fraction form
    20,171.20/30,285.60 = 11,423.20/x
  3. Step 3: Cross multiply
    20,171.20x = 30,285.60 × 11,423.20
  4. Step 4: Simplify right side
    20,171.20x = 345,958,465.92
  5. Step 5: Solve for x
    x = 345,958,465.92/20,171.20
  6. Step 6: Final answer
    x = 17,151.11

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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.