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Finding the Fourth Proportional to 27,659.40, 41,391.90 and 18,911.40

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Solution

The fourth proportional to 27,659.40, 41,391.90 and 18,911.40 is: 28,300.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,659.40 : 41,391.90 = 18,911.40 : x
  2. Step 2: Convert to fraction form
    27,659.40/41,391.90 = 18,911.40/x
  3. Step 3: Cross multiply
    27,659.40x = 41,391.90 × 18,911.40
  4. Step 4: Simplify right side
    27,659.40x = 782,778,777.66
  5. Step 5: Solve for x
    x = 782,778,777.66/27,659.40
  6. Step 6: Final answer
    x = 28,300.64

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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.