Home / 21,428.50-29,571.34-11,997.26

Finding the Fourth Proportional to 21,428.50, 29,571.34 and 11,997.26

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Solution

The fourth proportional to 21,428.50, 29,571.34 and 11,997.26 is: 16,556.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,428.50 : 29,571.34 = 11,997.26 : x
  2. Step 2: Convert to fraction form
    21,428.50/29,571.34 = 11,997.26/x
  3. Step 3: Cross multiply
    21,428.50x = 29,571.34 × 11,997.26
  4. Step 4: Simplify right side
    21,428.50x = 354,775,054.53
  5. Step 5: Solve for x
    x = 354,775,054.53/21,428.50
  6. Step 6: Final answer
    x = 16,556.22

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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.