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Finding the Fourth Proportional to 18,430, 27,639.96 and 11,028.64

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Solution

The fourth proportional to 18,430, 27,639.96 and 11,028.64 is: 16,539.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,430 : 27,639.96 = 11,028.64 : x
  2. Step 2: Convert to fraction form
    18,430/27,639.96 = 11,028.64/x
  3. Step 3: Cross multiply
    18,430x = 27,639.96 × 11,028.64
  4. Step 4: Simplify right side
    18,430x = 304,831,168.45
  5. Step 5: Solve for x
    x = 304,831,168.45/18,430
  6. Step 6: Final answer
    x = 16,539.94

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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.