Home / 20,691.22-28,553.84-11,259.79

Finding the Fourth Proportional to 20,691.22, 28,553.84 and 11,259.79

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Solution

The fourth proportional to 20,691.22, 28,553.84 and 11,259.79 is: 15,538.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691.22 : 28,553.84 = 11,259.79 : x
  2. Step 2: Convert to fraction form
    20,691.22/28,553.84 = 11,259.79/x
  3. Step 3: Cross multiply
    20,691.22x = 28,553.84 × 11,259.79
  4. Step 4: Simplify right side
    20,691.22x = 321,510,242.09
  5. Step 5: Solve for x
    x = 321,510,242.09/20,691.22
  6. Step 6: Final answer
    x = 15,538.49

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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.