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Finding the Fourth Proportional to 30,773.20, 42,466.80 and 18,197.68

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Solution

The fourth proportional to 30,773.20, 42,466.80 and 18,197.68 is: 25,112.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,773.20 : 42,466.80 = 18,197.68 : x
  2. Step 2: Convert to fraction form
    30,773.20/42,466.80 = 18,197.68/x
  3. Step 3: Cross multiply
    30,773.20x = 42,466.80 × 18,197.68
  4. Step 4: Simplify right side
    30,773.20x = 772,797,237.02
  5. Step 5: Solve for x
    x = 772,797,237.02/30,773.20
  6. Step 6: Final answer
    x = 25,112.67

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.