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Finding the Fourth Proportional to 20,633.58, 30,929.04 and 8,136.66

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Solution

The fourth proportional to 20,633.58, 30,929.04 and 8,136.66 is: 12,196.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,633.58 : 30,929.04 = 8,136.66 : x
  2. Step 2: Convert to fraction form
    20,633.58/30,929.04 = 8,136.66/x
  3. Step 3: Cross multiply
    20,633.58x = 30,929.04 × 8,136.66
  4. Step 4: Simplify right side
    20,633.58x = 251,659,082.61
  5. Step 5: Solve for x
    x = 251,659,082.61/20,633.58
  6. Step 6: Final answer
    x = 12,196.58

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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.