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Finding the Fourth Proportional to 21,879.01, 30,202.82 and 17,022.75

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Solution

The fourth proportional to 21,879.01, 30,202.82 and 17,022.75 is: 23,499.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,879.01 : 30,202.82 = 17,022.75 : x
  2. Step 2: Convert to fraction form
    21,879.01/30,202.82 = 17,022.75/x
  3. Step 3: Cross multiply
    21,879.01x = 30,202.82 × 17,022.75
  4. Step 4: Simplify right side
    21,879.01x = 514,135,054.16
  5. Step 5: Solve for x
    x = 514,135,054.16/21,879.01
  6. Step 6: Final answer
    x = 23,499.01

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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.