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Finding the Fourth Proportional to 21,657.44, 29,887.56 and 11,721.44

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Solution

The fourth proportional to 21,657.44, 29,887.56 and 11,721.44 is: 16,175.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,657.44 : 29,887.56 = 11,721.44 : x
  2. Step 2: Convert to fraction form
    21,657.44/29,887.56 = 11,721.44/x
  3. Step 3: Cross multiply
    21,657.44x = 29,887.56 × 11,721.44
  4. Step 4: Simplify right side
    21,657.44x = 350,325,241.29
  5. Step 5: Solve for x
    x = 350,325,241.29/21,657.44
  6. Step 6: Final answer
    x = 16,175.75

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1.5x scale

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.