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Finding the Fourth Proportional to 18,612.10, 27,908.55 and 6,919.30

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Solution

The fourth proportional to 18,612.10, 27,908.55 and 6,919.30 is: 10,375.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,612.10 : 27,908.55 = 6,919.30 : x
  2. Step 2: Convert to fraction form
    18,612.10/27,908.55 = 6,919.30/x
  3. Step 3: Cross multiply
    18,612.10x = 27,908.55 × 6,919.30
  4. Step 4: Simplify right side
    18,612.10x = 193,107,630.02
  5. Step 5: Solve for x
    x = 193,107,630.02/18,612.10
  6. Step 6: Final answer
    x = 10,375.38

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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.