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Finding the Fourth Proportional to 19,918.22, 27,475.75 and 12,453.26

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Solution

The fourth proportional to 19,918.22, 27,475.75 and 12,453.26 is: 17,178.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,918.22 : 27,475.75 = 12,453.26 : x
  2. Step 2: Convert to fraction form
    19,918.22/27,475.75 = 12,453.26/x
  3. Step 3: Cross multiply
    19,918.22x = 27,475.75 × 12,453.26
  4. Step 4: Simplify right side
    19,918.22x = 342,162,658.45
  5. Step 5: Solve for x
    x = 342,162,658.45/19,918.22
  6. Step 6: Final answer
    x = 17,178.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.