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Finding the Fourth Proportional to 18,140.70, 27,174.60 and 12,235.80

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Solution

The fourth proportional to 18,140.70, 27,174.60 and 12,235.80 is: 18,329.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,140.70 : 27,174.60 = 12,235.80 : x
  2. Step 2: Convert to fraction form
    18,140.70/27,174.60 = 12,235.80/x
  3. Step 3: Cross multiply
    18,140.70x = 27,174.60 × 12,235.80
  4. Step 4: Simplify right side
    18,140.70x = 332,502,970.68
  5. Step 5: Solve for x
    x = 332,502,970.68/18,140.70
  6. Step 6: Final answer
    x = 18,329.11

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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.