Home / 21,286.89-29,375.91-11,856.06

Finding the Fourth Proportional to 21,286.89, 29,375.91 and 11,856.06

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Solution

The fourth proportional to 21,286.89, 29,375.91 and 11,856.06 is: 16,361.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,286.89 : 29,375.91 = 11,856.06 : x
  2. Step 2: Convert to fraction form
    21,286.89/29,375.91 = 11,856.06/x
  3. Step 3: Cross multiply
    21,286.89x = 29,375.91 × 11,856.06
  4. Step 4: Simplify right side
    21,286.89x = 348,282,551.51
  5. Step 5: Solve for x
    x = 348,282,551.51/21,286.89
  6. Step 6: Final answer
    x = 16,361.36

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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.