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Finding the Fourth Proportional to 28,494.80, 39,309 and 20,092.88

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Solution

The fourth proportional to 28,494.80, 39,309 and 20,092.88 is: 27,718.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,494.80 : 39,309 = 20,092.88 : x
  2. Step 2: Convert to fraction form
    28,494.80/39,309 = 20,092.88/x
  3. Step 3: Cross multiply
    28,494.80x = 39,309 × 20,092.88
  4. Step 4: Simplify right side
    28,494.80x = 789,831,019.92
  5. Step 5: Solve for x
    x = 789,831,019.92/28,494.80
  6. Step 6: Final answer
    x = 27,718.43

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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.