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Finding the Fourth Proportional to 30,086.64, 45,129.64 and 11,605.68

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Solution

The fourth proportional to 30,086.64, 45,129.64 and 11,605.68 is: 17,408.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,086.64 : 45,129.64 = 11,605.68 : x
  2. Step 2: Convert to fraction form
    30,086.64/45,129.64 = 11,605.68/x
  3. Step 3: Cross multiply
    30,086.64x = 45,129.64 × 11,605.68
  4. Step 4: Simplify right side
    30,086.64x = 523,760,160.36
  5. Step 5: Solve for x
    x = 523,760,160.36/30,086.64
  6. Step 6: Final answer
    x = 17,408.40

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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.