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Finding the Fourth Proportional to 19,143.54, 28,715.31 and 8,748

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Solution

The fourth proportional to 19,143.54, 28,715.31 and 8,748 is: 13,122

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,143.54 : 28,715.31 = 8,748 : x
  2. Step 2: Convert to fraction form
    19,143.54/28,715.31 = 8,748/x
  3. Step 3: Cross multiply
    19,143.54x = 28,715.31 × 8,748
  4. Step 4: Simplify right side
    19,143.54x = 251,201,531.88
  5. Step 5: Solve for x
    x = 251,201,531.88/19,143.54
  6. Step 6: Final answer
    x = 13,122

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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.