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Finding the Fourth Proportional to 20,299.69, 30,449.53 and 7,148.98

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Solution

The fourth proportional to 20,299.69, 30,449.53 and 7,148.98 is: 10,723.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,299.69 : 30,449.53 = 7,148.98 : x
  2. Step 2: Convert to fraction form
    20,299.69/30,449.53 = 7,148.98/x
  3. Step 3: Cross multiply
    20,299.69x = 30,449.53 × 7,148.98
  4. Step 4: Simplify right side
    20,299.69x = 217,682,892.99
  5. Step 5: Solve for x
    x = 217,682,892.99/20,299.69
  6. Step 6: Final answer
    x = 10,723.46

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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.