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Finding the Fourth Proportional to 16,854.80, 25,285.80 and 5,169.20

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Solution

The fourth proportional to 16,854.80, 25,285.80 and 5,169.20 is: 7,754.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,854.80 : 25,285.80 = 5,169.20 : x
  2. Step 2: Convert to fraction form
    16,854.80/25,285.80 = 5,169.20/x
  3. Step 3: Cross multiply
    16,854.80x = 25,285.80 × 5,169.20
  4. Step 4: Simplify right side
    16,854.80x = 130,707,357.36
  5. Step 5: Solve for x
    x = 130,707,357.36/16,854.80
  6. Step 6: Final answer
    x = 7,754.90

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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.