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Finding the Fourth Proportional to 18,761.66, 28,152.18 and 8,239.07

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Solution

The fourth proportional to 18,761.66, 28,152.18 and 8,239.07 is: 12,362.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,761.66 : 28,152.18 = 8,239.07 : x
  2. Step 2: Convert to fraction form
    18,761.66/28,152.18 = 8,239.07/x
  3. Step 3: Cross multiply
    18,761.66x = 28,152.18 × 8,239.07
  4. Step 4: Simplify right side
    18,761.66x = 231,947,716.87
  5. Step 5: Solve for x
    x = 231,947,716.87/18,761.66
  6. Step 6: Final answer
    x = 12,362.85

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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.