Home / 12,982.85-17,918.66-12,391.22

Finding the Fourth Proportional to 12,982.85, 17,918.66 and 12,391.22

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Solution

The fourth proportional to 12,982.85, 17,918.66 and 12,391.22 is: 17,102.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,982.85 : 17,918.66 = 12,391.22 : x
  2. Step 2: Convert to fraction form
    12,982.85/17,918.66 = 12,391.22/x
  3. Step 3: Cross multiply
    12,982.85x = 17,918.66 × 12,391.22
  4. Step 4: Simplify right side
    12,982.85x = 222,034,133.94
  5. Step 5: Solve for x
    x = 222,034,133.94/12,982.85
  6. Step 6: Final answer
    x = 17,102.11

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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.