Home / 21,286.71-29,375.64-11,855.25

Finding the Fourth Proportional to 21,286.71, 29,375.64 and 11,855.25

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Solution

The fourth proportional to 21,286.71, 29,375.64 and 11,855.25 is: 16,360.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,286.71 : 29,375.64 = 11,855.25 : x
  2. Step 2: Convert to fraction form
    21,286.71/29,375.64 = 11,855.25/x
  3. Step 3: Cross multiply
    21,286.71x = 29,375.64 × 11,855.25
  4. Step 4: Simplify right side
    21,286.71x = 348,255,556.11
  5. Step 5: Solve for x
    x = 348,255,556.11/21,286.71
  6. Step 6: Final answer
    x = 16,360.23

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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.