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Finding the Fourth Proportional to 17,963.90, 26,959.92 and 12,455.90

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Solution

The fourth proportional to 17,963.90, 26,959.92 and 12,455.90 is: 18,693.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,963.90 : 26,959.92 = 12,455.90 : x
  2. Step 2: Convert to fraction form
    17,963.90/26,959.92 = 12,455.90/x
  3. Step 3: Cross multiply
    17,963.90x = 26,959.92 × 12,455.90
  4. Step 4: Simplify right side
    17,963.90x = 335,810,067.53
  5. Step 5: Solve for x
    x = 335,810,067.53/17,963.90
  6. Step 6: Final answer
    x = 18,693.61

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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.