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Finding the Fourth Proportional to 18,971.54, 28,453.38 and 5,644.62

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Solution

The fourth proportional to 18,971.54, 28,453.38 and 5,644.62 is: 8,465.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,971.54 : 28,453.38 = 5,644.62 : x
  2. Step 2: Convert to fraction form
    18,971.54/28,453.38 = 5,644.62/x
  3. Step 3: Cross multiply
    18,971.54x = 28,453.38 × 5,644.62
  4. Step 4: Simplify right side
    18,971.54x = 160,608,517.82
  5. Step 5: Solve for x
    x = 160,608,517.82/18,971.54
  6. Step 6: Final answer
    x = 8,465.76

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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.