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Finding the Fourth Proportional to 17,843.63, 26,781.66 and 7,981.07

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Solution

The fourth proportional to 17,843.63, 26,781.66 and 7,981.07 is: 11,978.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,843.63 : 26,781.66 = 7,981.07 : x
  2. Step 2: Convert to fraction form
    17,843.63/26,781.66 = 7,981.07/x
  3. Step 3: Cross multiply
    17,843.63x = 26,781.66 × 7,981.07
  4. Step 4: Simplify right side
    17,843.63x = 213,746,169.27
  5. Step 5: Solve for x
    x = 213,746,169.27/17,843.63
  6. Step 6: Final answer
    x = 11,978.85

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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.