Home / 13,391.63-18,480.45-8,087.75

Finding the Fourth Proportional to 13,391.63, 18,480.45 and 8,087.75

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Solution

The fourth proportional to 13,391.63, 18,480.45 and 8,087.75 is: 11,161.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,391.63 : 18,480.45 = 8,087.75 : x
  2. Step 2: Convert to fraction form
    13,391.63/18,480.45 = 8,087.75/x
  3. Step 3: Cross multiply
    13,391.63x = 18,480.45 × 8,087.75
  4. Step 4: Simplify right side
    13,391.63x = 149,465,167.09
  5. Step 5: Solve for x
    x = 149,465,167.09/13,391.63
  6. Step 6: Final answer
    x = 11,161.09

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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.