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Finding the Fourth Proportional to 20,493.45, 30,690.90 and 11,701.71

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Solution

The fourth proportional to 20,493.45, 30,690.90 and 11,701.71 is: 17,524.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,493.45 : 30,690.90 = 11,701.71 : x
  2. Step 2: Convert to fraction form
    20,493.45/30,690.90 = 11,701.71/x
  3. Step 3: Cross multiply
    20,493.45x = 30,690.90 × 11,701.71
  4. Step 4: Simplify right side
    20,493.45x = 359,136,011.44
  5. Step 5: Solve for x
    x = 359,136,011.44/20,493.45
  6. Step 6: Final answer
    x = 17,524.43

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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.