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Finding the Fourth Proportional to 18,478.92, 27,717.48 and 6,791.40

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Solution

The fourth proportional to 18,478.92, 27,717.48 and 6,791.40 is: 10,186.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,478.92 : 27,717.48 = 6,791.40 : x
  2. Step 2: Convert to fraction form
    18,478.92/27,717.48 = 6,791.40/x
  3. Step 3: Cross multiply
    18,478.92x = 27,717.48 × 6,791.40
  4. Step 4: Simplify right side
    18,478.92x = 188,240,493.67
  5. Step 5: Solve for x
    x = 188,240,493.67/18,478.92
  6. Step 6: Final answer
    x = 10,186.77

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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.