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Finding the Fourth Proportional to 16,991.20, 25,429.20 and 14,917.60

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Solution

The fourth proportional to 16,991.20, 25,429.20 and 14,917.60 is: 22,325.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,991.20 : 25,429.20 = 14,917.60 : x
  2. Step 2: Convert to fraction form
    16,991.20/25,429.20 = 14,917.60/x
  3. Step 3: Cross multiply
    16,991.20x = 25,429.20 × 14,917.60
  4. Step 4: Simplify right side
    16,991.20x = 379,342,633.92
  5. Step 5: Solve for x
    x = 379,342,633.92/16,991.20
  6. Step 6: Final answer
    x = 22,325.83

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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.