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Finding the Fourth Proportional to 20,162.61, 30,239.01 and 6,311.61

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Solution

The fourth proportional to 20,162.61, 30,239.01 and 6,311.61 is: 9,465.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,162.61 : 30,239.01 = 6,311.61 : x
  2. Step 2: Convert to fraction form
    20,162.61/30,239.01 = 6,311.61/x
  3. Step 3: Cross multiply
    20,162.61x = 30,239.01 × 6,311.61
  4. Step 4: Simplify right side
    20,162.61x = 190,856,837.91
  5. Step 5: Solve for x
    x = 190,856,837.91/20,162.61
  6. Step 6: Final answer
    x = 9,465.88

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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.