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Finding the Fourth Proportional to 19,342, 28,968 and 18,809.90

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Solution

The fourth proportional to 19,342, 28,968 and 18,809.90 is: 28,171.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,342 : 28,968 = 18,809.90 : x
  2. Step 2: Convert to fraction form
    19,342/28,968 = 18,809.90/x
  3. Step 3: Cross multiply
    19,342x = 28,968 × 18,809.90
  4. Step 4: Simplify right side
    19,342x = 544,885,183.20
  5. Step 5: Solve for x
    x = 544,885,183.20/19,342
  6. Step 6: Final answer
    x = 28,171.09

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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.