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Finding the Fourth Proportional to 38,307.60, 57,338.28 and 20,493.81

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Solution

The fourth proportional to 38,307.60, 57,338.28 and 20,493.81 is: 30,674.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,307.60 : 57,338.28 = 20,493.81 : x
  2. Step 2: Convert to fraction form
    38,307.60/57,338.28 = 20,493.81/x
  3. Step 3: Cross multiply
    38,307.60x = 57,338.28 × 20,493.81
  4. Step 4: Simplify right side
    38,307.60x = 1,175,079,816.05
  5. Step 5: Solve for x
    x = 1,175,079,816.05/38,307.60
  6. Step 6: Final answer
    x = 30,674.85

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.