Home / 21,003.12-28,984.50-11,571.84

Finding the Fourth Proportional to 21,003.12, 28,984.50 and 11,571.84

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Solution

The fourth proportional to 21,003.12, 28,984.50 and 11,571.84 is: 15,969.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,003.12 : 28,984.50 = 11,571.84 : x
  2. Step 2: Convert to fraction form
    21,003.12/28,984.50 = 11,571.84/x
  3. Step 3: Cross multiply
    21,003.12x = 28,984.50 × 11,571.84
  4. Step 4: Simplify right side
    21,003.12x = 335,403,996.48
  5. Step 5: Solve for x
    x = 335,403,996.48/21,003.12
  6. Step 6: Final answer
    x = 15,969.25

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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.