Home / 20,690.55-31,035.83-20,471.85

Finding the Fourth Proportional to 20,690.55, 31,035.83 and 20,471.85

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Solution

The fourth proportional to 20,690.55, 31,035.83 and 20,471.85 is: 30,707.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.55 : 31,035.83 = 20,471.85 : x
  2. Step 2: Convert to fraction form
    20,690.55/31,035.83 = 20,471.85/x
  3. Step 3: Cross multiply
    20,690.55x = 31,035.83 × 20,471.85
  4. Step 4: Simplify right side
    20,690.55x = 635,360,754.03
  5. Step 5: Solve for x
    x = 635,360,754.03/20,690.55
  6. Step 6: Final answer
    x = 30,707.78

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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.