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Finding the Fourth Proportional to 18,890.64, 28,317.49 and 7,035.73

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Solution

The fourth proportional to 18,890.64, 28,317.49 and 7,035.73 is: 10,546.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,890.64 : 28,317.49 = 7,035.73 : x
  2. Step 2: Convert to fraction form
    18,890.64/28,317.49 = 7,035.73/x
  3. Step 3: Cross multiply
    18,890.64x = 28,317.49 × 7,035.73
  4. Step 4: Simplify right side
    18,890.64x = 199,234,125.53
  5. Step 5: Solve for x
    x = 199,234,125.53/18,890.64
  6. Step 6: Final answer
    x = 10,546.71

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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.