Home / 21,015.22-28,999.62-11,583.82

Finding the Fourth Proportional to 21,015.22, 28,999.62 and 11,583.82

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Solution

The fourth proportional to 21,015.22, 28,999.62 and 11,583.82 is: 15,984.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,015.22 : 28,999.62 = 11,583.82 : x
  2. Step 2: Convert to fraction form
    21,015.22/28,999.62 = 11,583.82/x
  3. Step 3: Cross multiply
    21,015.22x = 28,999.62 × 11,583.82
  4. Step 4: Simplify right side
    21,015.22x = 335,926,378.15
  5. Step 5: Solve for x
    x = 335,926,378.15/21,015.22
  6. Step 6: Final answer
    x = 15,984.91

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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.