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Finding the Fourth Proportional to 28,489.61, 42,739.28 and 8,767.73

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Solution

The fourth proportional to 28,489.61, 42,739.28 and 8,767.73 is: 13,153.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,489.61 : 42,739.28 = 8,767.73 : x
  2. Step 2: Convert to fraction form
    28,489.61/42,739.28 = 8,767.73/x
  3. Step 3: Cross multiply
    28,489.61x = 42,739.28 × 8,767.73
  4. Step 4: Simplify right side
    28,489.61x = 374,726,467.43
  5. Step 5: Solve for x
    x = 374,726,467.43/28,489.61
  6. Step 6: Final answer
    x = 13,153.09

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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.