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Finding the Fourth Proportional to 18,619.10, 27,912.05 and 6,924.32

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Solution

The fourth proportional to 18,619.10, 27,912.05 and 6,924.32 is: 10,380.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,619.10 : 27,912.05 = 6,924.32 : x
  2. Step 2: Convert to fraction form
    18,619.10/27,912.05 = 6,924.32/x
  3. Step 3: Cross multiply
    18,619.10x = 27,912.05 × 6,924.32
  4. Step 4: Simplify right side
    18,619.10x = 193,271,931.43
  5. Step 5: Solve for x
    x = 193,271,931.43/18,619.10
  6. Step 6: Final answer
    x = 10,380.30

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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.