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Finding the Fourth Proportional to 20,398.51, 30,600.20 and 7,252.21

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Solution

The fourth proportional to 20,398.51, 30,600.20 and 7,252.21 is: 10,879.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,398.51 : 30,600.20 = 7,252.21 : x
  2. Step 2: Convert to fraction form
    20,398.51/30,600.20 = 7,252.21/x
  3. Step 3: Cross multiply
    20,398.51x = 30,600.20 × 7,252.21
  4. Step 4: Simplify right side
    20,398.51x = 221,919,076.44
  5. Step 5: Solve for x
    x = 221,919,076.44/20,398.51
  6. Step 6: Final answer
    x = 10,879.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.