Home / 18,872.19-28,311.69-7,772.82

Finding the Fourth Proportional to 18,872.19, 28,311.69 and 7,772.82

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Solution

The fourth proportional to 18,872.19, 28,311.69 and 7,772.82 is: 11,660.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,872.19 : 28,311.69 = 7,772.82 : x
  2. Step 2: Convert to fraction form
    18,872.19/28,311.69 = 7,772.82/x
  3. Step 3: Cross multiply
    18,872.19x = 28,311.69 × 7,772.82
  4. Step 4: Simplify right side
    18,872.19x = 220,061,670.27
  5. Step 5: Solve for x
    x = 220,061,670.27/18,872.19
  6. Step 6: Final answer
    x = 11,660.63

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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.