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Finding the Fourth Proportional to 21,634.56, 32,455.32 and 8,479.80

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Solution

The fourth proportional to 21,634.56, 32,455.32 and 8,479.80 is: 12,721.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,634.56 : 32,455.32 = 8,479.80 : x
  2. Step 2: Convert to fraction form
    21,634.56/32,455.32 = 8,479.80/x
  3. Step 3: Cross multiply
    21,634.56x = 32,455.32 × 8,479.80
  4. Step 4: Simplify right side
    21,634.56x = 275,214,622.54
  5. Step 5: Solve for x
    x = 275,214,622.54/21,634.56
  6. Step 6: Final answer
    x = 12,721.06

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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.