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Finding the Fourth Proportional to 16,991.80, 25,490.43 and 5,905.06

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Solution

The fourth proportional to 16,991.80, 25,490.43 and 5,905.06 is: 8,858.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,991.80 : 25,490.43 = 5,905.06 : x
  2. Step 2: Convert to fraction form
    16,991.80/25,490.43 = 5,905.06/x
  3. Step 3: Cross multiply
    16,991.80x = 25,490.43 × 5,905.06
  4. Step 4: Simplify right side
    16,991.80x = 150,522,518.58
  5. Step 5: Solve for x
    x = 150,522,518.58/16,991.80
  6. Step 6: Final answer
    x = 8,858.54

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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.