Home / 16,991.20-23,449.94-9,919.90

Finding the Fourth Proportional to 16,991.20, 23,449.94 and 9,919.90

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Solution

The fourth proportional to 16,991.20, 23,449.94 and 9,919.90 is: 13,690.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,991.20 : 23,449.94 = 9,919.90 : x
  2. Step 2: Convert to fraction form
    16,991.20/23,449.94 = 9,919.90/x
  3. Step 3: Cross multiply
    16,991.20x = 23,449.94 × 9,919.90
  4. Step 4: Simplify right side
    16,991.20x = 232,621,059.81
  5. Step 5: Solve for x
    x = 232,621,059.81/16,991.20
  6. Step 6: Final answer
    x = 13,690.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.