Home / 11,990.43-17,865.09-11,319.75

Finding the Fourth Proportional to 11,990.43, 17,865.09 and 11,319.75

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Solution

The fourth proportional to 11,990.43, 17,865.09 and 11,319.75 is: 16,865.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,990.43 : 17,865.09 = 11,319.75 : x
  2. Step 2: Convert to fraction form
    11,990.43/17,865.09 = 11,319.75/x
  3. Step 3: Cross multiply
    11,990.43x = 17,865.09 × 11,319.75
  4. Step 4: Simplify right side
    11,990.43x = 202,228,352.53
  5. Step 5: Solve for x
    x = 202,228,352.53/11,990.43
  6. Step 6: Final answer
    x = 16,865.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.