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Finding the Fourth Proportional to 19,257, 28,885.50 and 5,406

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Solution

The fourth proportional to 19,257, 28,885.50 and 5,406 is: 8,109

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,257 : 28,885.50 = 5,406 : x
  2. Step 2: Convert to fraction form
    19,257/28,885.50 = 5,406/x
  3. Step 3: Cross multiply
    19,257x = 28,885.50 × 5,406
  4. Step 4: Simplify right side
    19,257x = 156,155,013
  5. Step 5: Solve for x
    x = 156,155,013/19,257
  6. Step 6: Final answer
    x = 8,109

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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.