Home / 11,986.57-17,965.73-5,405.05

Finding the Fourth Proportional to 11,986.57, 17,965.73 and 5,405.05

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Solution

The fourth proportional to 11,986.57, 17,965.73 and 5,405.05 is: 8,101.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,986.57 : 17,965.73 = 5,405.05 : x
  2. Step 2: Convert to fraction form
    11,986.57/17,965.73 = 5,405.05/x
  3. Step 3: Cross multiply
    11,986.57x = 17,965.73 × 5,405.05
  4. Step 4: Simplify right side
    11,986.57x = 97,105,668.94
  5. Step 5: Solve for x
    x = 97,105,668.94/11,986.57
  6. Step 6: Final answer
    x = 8,101.21

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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.