Home / 20,136.42-30,206.10-5,345

Finding the Fourth Proportional to 20,136.42, 30,206.10 and 5,345

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Solution

The fourth proportional to 20,136.42, 30,206.10 and 5,345 is: 8,017.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,136.42 : 30,206.10 = 5,345 : x
  2. Step 2: Convert to fraction form
    20,136.42/30,206.10 = 5,345/x
  3. Step 3: Cross multiply
    20,136.42x = 30,206.10 × 5,345
  4. Step 4: Simplify right side
    20,136.42x = 161,451,604.50
  5. Step 5: Solve for x
    x = 161,451,604.50/20,136.42
  6. Step 6: Final answer
    x = 8,017.89

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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.