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Finding the Fourth Proportional to 20,183.70, 30,275.55 and 17,721.30

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Solution

The fourth proportional to 20,183.70, 30,275.55 and 17,721.30 is: 26,581.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,183.70 : 30,275.55 = 17,721.30 : x
  2. Step 2: Convert to fraction form
    20,183.70/30,275.55 = 17,721.30/x
  3. Step 3: Cross multiply
    20,183.70x = 30,275.55 × 17,721.30
  4. Step 4: Simplify right side
    20,183.70x = 536,522,104.22
  5. Step 5: Solve for x
    x = 536,522,104.22/20,183.70
  6. Step 6: Final answer
    x = 26,581.95

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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.