Home / 20,921.06-28,871.22-11,968.01

Finding the Fourth Proportional to 20,921.06, 28,871.22 and 11,968.01

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Solution

The fourth proportional to 20,921.06, 28,871.22 and 11,968.01 is: 16,515.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,921.06 : 28,871.22 = 11,968.01 : x
  2. Step 2: Convert to fraction form
    20,921.06/28,871.22 = 11,968.01/x
  3. Step 3: Cross multiply
    20,921.06x = 28,871.22 × 11,968.01
  4. Step 4: Simplify right side
    20,921.06x = 345,531,049.67
  5. Step 5: Solve for x
    x = 345,531,049.67/20,921.06
  6. Step 6: Final answer
    x = 16,515.94

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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.