Home / 21,003.05-28,984.74-11,571.61

Finding the Fourth Proportional to 21,003.05, 28,984.74 and 11,571.61

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Solution

The fourth proportional to 21,003.05, 28,984.74 and 11,571.61 is: 15,969.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,003.05 : 28,984.74 = 11,571.61 : x
  2. Step 2: Convert to fraction form
    21,003.05/28,984.74 = 11,571.61/x
  3. Step 3: Cross multiply
    21,003.05x = 28,984.74 × 11,571.61
  4. Step 4: Simplify right side
    21,003.05x = 335,400,045.72
  5. Step 5: Solve for x
    x = 335,400,045.72/21,003.05
  6. Step 6: Final answer
    x = 15,969.11

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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.