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Finding the Fourth Proportional to 17,285.40, 25,935.30 and 8,520.39

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Solution

The fourth proportional to 17,285.40, 25,935.30 and 8,520.39 is: 12,784.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,285.40 : 25,935.30 = 8,520.39 : x
  2. Step 2: Convert to fraction form
    17,285.40/25,935.30 = 8,520.39/x
  3. Step 3: Cross multiply
    17,285.40x = 25,935.30 × 8,520.39
  4. Step 4: Simplify right side
    17,285.40x = 220,978,870.77
  5. Step 5: Solve for x
    x = 220,978,870.77/17,285.40
  6. Step 6: Final answer
    x = 12,784.13

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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.