Home / 20,691.06-28,553.67-11,259.60

Finding the Fourth Proportional to 20,691.06, 28,553.67 and 11,259.60

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Solution

The fourth proportional to 20,691.06, 28,553.67 and 11,259.60 is: 15,538.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691.06 : 28,553.67 = 11,259.60 : x
  2. Step 2: Convert to fraction form
    20,691.06/28,553.67 = 11,259.60/x
  3. Step 3: Cross multiply
    20,691.06x = 28,553.67 × 11,259.60
  4. Step 4: Simplify right side
    20,691.06x = 321,502,902.73
  5. Step 5: Solve for x
    x = 321,502,902.73/20,691.06
  6. Step 6: Final answer
    x = 15,538.25

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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.