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Finding the Fourth Proportional to 20,602.45, 30,890.02 and 7,453.11

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Solution

The fourth proportional to 20,602.45, 30,890.02 and 7,453.11 is: 11,174.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,602.45 : 30,890.02 = 7,453.11 : x
  2. Step 2: Convert to fraction form
    20,602.45/30,890.02 = 7,453.11/x
  3. Step 3: Cross multiply
    20,602.45x = 30,890.02 × 7,453.11
  4. Step 4: Simplify right side
    20,602.45x = 230,226,716.96
  5. Step 5: Solve for x
    x = 230,226,716.96/20,602.45
  6. Step 6: Final answer
    x = 11,174.73

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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.