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Finding the Fourth Proportional to 18,497.40, 27,729.90 and 11,104.80

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Solution

The fourth proportional to 18,497.40, 27,729.90 and 11,104.80 is: 16,647.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,497.40 : 27,729.90 = 11,104.80 : x
  2. Step 2: Convert to fraction form
    18,497.40/27,729.90 = 11,104.80/x
  3. Step 3: Cross multiply
    18,497.40x = 27,729.90 × 11,104.80
  4. Step 4: Simplify right side
    18,497.40x = 307,934,993.52
  5. Step 5: Solve for x
    x = 307,934,993.52/18,497.40
  6. Step 6: Final answer
    x = 16,647.47

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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.