Home / 21,286.44-29,376.20-11,855

Finding the Fourth Proportional to 21,286.44, 29,376.20 and 11,855

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Solution

The fourth proportional to 21,286.44, 29,376.20 and 11,855 is: 16,360.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,286.44 : 29,376.20 = 11,855 : x
  2. Step 2: Convert to fraction form
    21,286.44/29,376.20 = 11,855/x
  3. Step 3: Cross multiply
    21,286.44x = 29,376.20 × 11,855
  4. Step 4: Simplify right side
    21,286.44x = 348,254,851
  5. Step 5: Solve for x
    x = 348,254,851/21,286.44
  6. Step 6: Final answer
    x = 16,360.41

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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.