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Finding the Fourth Proportional to 17,791.16, 26,687.21 and 8,428.91

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Solution

The fourth proportional to 17,791.16, 26,687.21 and 8,428.91 is: 12,643.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,791.16 : 26,687.21 = 8,428.91 : x
  2. Step 2: Convert to fraction form
    17,791.16/26,687.21 = 8,428.91/x
  3. Step 3: Cross multiply
    17,791.16x = 26,687.21 × 8,428.91
  4. Step 4: Simplify right side
    17,791.16x = 224,943,915.66
  5. Step 5: Solve for x
    x = 224,943,915.66/17,791.16
  6. Step 6: Final answer
    x = 12,643.58

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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.