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Finding the Fourth Proportional to 18,653.80, 25,737.94 and 13,620.73

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Solution

The fourth proportional to 18,653.80, 25,737.94 and 13,620.73 is: 18,793.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,653.80 : 25,737.94 = 13,620.73 : x
  2. Step 2: Convert to fraction form
    18,653.80/25,737.94 = 13,620.73/x
  3. Step 3: Cross multiply
    18,653.80x = 25,737.94 × 13,620.73
  4. Step 4: Simplify right side
    18,653.80x = 350,569,531.50
  5. Step 5: Solve for x
    x = 350,569,531.50/18,653.80
  6. Step 6: Final answer
    x = 18,793.46

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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.