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Finding the Fourth Proportional to 38,662.80, 57,994.20 and 20,192.40

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Solution

The fourth proportional to 38,662.80, 57,994.20 and 20,192.40 is: 30,288.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,662.80 : 57,994.20 = 20,192.40 : x
  2. Step 2: Convert to fraction form
    38,662.80/57,994.20 = 20,192.40/x
  3. Step 3: Cross multiply
    38,662.80x = 57,994.20 × 20,192.40
  4. Step 4: Simplify right side
    38,662.80x = 1,171,042,084.08
  5. Step 5: Solve for x
    x = 1,171,042,084.08/38,662.80
  6. Step 6: Final answer
    x = 30,288.60

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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.