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Finding the Fourth Proportional to 17,217.78, 25,830.96 and 4,905.78

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Solution

The fourth proportional to 17,217.78, 25,830.96 and 4,905.78 is: 7,359.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,217.78 : 25,830.96 = 4,905.78 : x
  2. Step 2: Convert to fraction form
    17,217.78/25,830.96 = 4,905.78/x
  3. Step 3: Cross multiply
    17,217.78x = 25,830.96 × 4,905.78
  4. Step 4: Simplify right side
    17,217.78x = 126,721,006.95
  5. Step 5: Solve for x
    x = 126,721,006.95/17,217.78
  6. Step 6: Final answer
    x = 7,359.89

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1.5x scale

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.