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Finding the Fourth Proportional to 18,212.80, 27,313.80 and 7,113.10

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Solution

The fourth proportional to 18,212.80, 27,313.80 and 7,113.10 is: 10,667.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,212.80 : 27,313.80 = 7,113.10 : x
  2. Step 2: Convert to fraction form
    18,212.80/27,313.80 = 7,113.10/x
  3. Step 3: Cross multiply
    18,212.80x = 27,313.80 × 7,113.10
  4. Step 4: Simplify right side
    18,212.80x = 194,285,790.78
  5. Step 5: Solve for x
    x = 194,285,790.78/18,212.80
  6. Step 6: Final answer
    x = 10,667.54

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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.