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Finding the Fourth Proportional to 18,211, 27,310.40 and 7,114.80

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Solution

The fourth proportional to 18,211, 27,310.40 and 7,114.80 is: 10,669.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,211 : 27,310.40 = 7,114.80 : x
  2. Step 2: Convert to fraction form
    18,211/27,310.40 = 7,114.80/x
  3. Step 3: Cross multiply
    18,211x = 27,310.40 × 7,114.80
  4. Step 4: Simplify right side
    18,211x = 194,308,033.92
  5. Step 5: Solve for x
    x = 194,308,033.92/18,211
  6. Step 6: Final answer
    x = 10,669.82

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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.