Home / 21,003.25-28,984.62-11,571.88

Finding the Fourth Proportional to 21,003.25, 28,984.62 and 11,571.88

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Solution

The fourth proportional to 21,003.25, 28,984.62 and 11,571.88 is: 15,969.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,003.25 : 28,984.62 = 11,571.88 : x
  2. Step 2: Convert to fraction form
    21,003.25/28,984.62 = 11,571.88/x
  3. Step 3: Cross multiply
    21,003.25x = 28,984.62 × 11,571.88
  4. Step 4: Simplify right side
    21,003.25x = 335,406,544.49
  5. Step 5: Solve for x
    x = 335,406,544.49/21,003.25
  6. Step 6: Final answer
    x = 15,969.27

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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.