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Finding the Fourth Proportional to 38,635.60, 57,991.80 and 18,936.40

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Solution

The fourth proportional to 38,635.60, 57,991.80 and 18,936.40 is: 28,423.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,635.60 : 57,991.80 = 18,936.40 : x
  2. Step 2: Convert to fraction form
    38,635.60/57,991.80 = 18,936.40/x
  3. Step 3: Cross multiply
    38,635.60x = 57,991.80 × 18,936.40
  4. Step 4: Simplify right side
    38,635.60x = 1,098,155,921.52
  5. Step 5: Solve for x
    x = 1,098,155,921.52/38,635.60
  6. Step 6: Final answer
    x = 28,423.42

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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.