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Finding the Fourth Proportional to 19,171.44, 28,773.96 and 9,318

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Solution

The fourth proportional to 19,171.44, 28,773.96 and 9,318 is: 13,985.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,171.44 : 28,773.96 = 9,318 : x
  2. Step 2: Convert to fraction form
    19,171.44/28,773.96 = 9,318/x
  3. Step 3: Cross multiply
    19,171.44x = 28,773.96 × 9,318
  4. Step 4: Simplify right side
    19,171.44x = 268,115,759.28
  5. Step 5: Solve for x
    x = 268,115,759.28/19,171.44
  6. Step 6: Final answer
    x = 13,985.17

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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.