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Finding the Fourth Proportional to 21,657.25, 29,887.02 and 11,721.25

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Solution

The fourth proportional to 21,657.25, 29,887.02 and 11,721.25 is: 16,175.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,657.25 : 29,887.02 = 11,721.25 : x
  2. Step 2: Convert to fraction form
    21,657.25/29,887.02 = 11,721.25/x
  3. Step 3: Cross multiply
    21,657.25x = 29,887.02 × 11,721.25
  4. Step 4: Simplify right side
    21,657.25x = 350,313,233.18
  5. Step 5: Solve for x
    x = 350,313,233.18/21,657.25
  6. Step 6: Final answer
    x = 16,175.33

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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.