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Finding the Fourth Proportional to 18,807.75, 28,213.34 and 4,956.75

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Solution

The fourth proportional to 18,807.75, 28,213.34 and 4,956.75 is: 7,435.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,807.75 : 28,213.34 = 4,956.75 : x
  2. Step 2: Convert to fraction form
    18,807.75/28,213.34 = 4,956.75/x
  3. Step 3: Cross multiply
    18,807.75x = 28,213.34 × 4,956.75
  4. Step 4: Simplify right side
    18,807.75x = 139,846,448.26
  5. Step 5: Solve for x
    x = 139,846,448.26/18,807.75
  6. Step 6: Final answer
    x = 7,435.58

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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.