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Finding the Fourth Proportional to 18,628.62, 27,934.72 and 9,861.48

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Solution

The fourth proportional to 18,628.62, 27,934.72 and 9,861.48 is: 14,787.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,628.62 : 27,934.72 = 9,861.48 : x
  2. Step 2: Convert to fraction form
    18,628.62/27,934.72 = 9,861.48/x
  3. Step 3: Cross multiply
    18,628.62x = 27,934.72 × 9,861.48
  4. Step 4: Simplify right side
    18,628.62x = 275,477,713.40
  5. Step 5: Solve for x
    x = 275,477,713.40/18,628.62
  6. Step 6: Final answer
    x = 14,787.88

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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.