Home / 13,744.99-18,969.44-9,919.79

Finding the Fourth Proportional to 13,744.99, 18,969.44 and 9,919.79

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Solution

The fourth proportional to 13,744.99, 18,969.44 and 9,919.79 is: 13,690.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,744.99 : 18,969.44 = 9,919.79 : x
  2. Step 2: Convert to fraction form
    13,744.99/18,969.44 = 9,919.79/x
  3. Step 3: Cross multiply
    13,744.99x = 18,969.44 × 9,919.79
  4. Step 4: Simplify right side
    13,744.99x = 188,172,861.22
  5. Step 5: Solve for x
    x = 188,172,861.22/13,744.99
  6. Step 6: Final answer
    x = 13,690.29

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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.