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Finding the Fourth Proportional to 28,193, 42,289.50 and 9,725

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Solution

The fourth proportional to 28,193, 42,289.50 and 9,725 is: 14,587.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,193 : 42,289.50 = 9,725 : x
  2. Step 2: Convert to fraction form
    28,193/42,289.50 = 9,725/x
  3. Step 3: Cross multiply
    28,193x = 42,289.50 × 9,725
  4. Step 4: Simplify right side
    28,193x = 411,265,387.50
  5. Step 5: Solve for x
    x = 411,265,387.50/28,193
  6. Step 6: Final answer
    x = 14,587.50

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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.