Home / 21,428.88-29,571.66-11,997.60

Finding the Fourth Proportional to 21,428.88, 29,571.66 and 11,997.60

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Solution

The fourth proportional to 21,428.88, 29,571.66 and 11,997.60 is: 16,556.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,428.88 : 29,571.66 = 11,997.60 : x
  2. Step 2: Convert to fraction form
    21,428.88/29,571.66 = 11,997.60/x
  3. Step 3: Cross multiply
    21,428.88x = 29,571.66 × 11,997.60
  4. Step 4: Simplify right side
    21,428.88x = 354,788,948.02
  5. Step 5: Solve for x
    x = 354,788,948.02/21,428.88
  6. Step 6: Final answer
    x = 16,556.58

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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.