Home / 13,185.85-18,196.49-7,217.90

Finding the Fourth Proportional to 13,185.85, 18,196.49 and 7,217.90

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Solution

The fourth proportional to 13,185.85, 18,196.49 and 7,217.90 is: 9,960.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,185.85 : 18,196.49 = 7,217.90 : x
  2. Step 2: Convert to fraction form
    13,185.85/18,196.49 = 7,217.90/x
  3. Step 3: Cross multiply
    13,185.85x = 18,196.49 × 7,217.90
  4. Step 4: Simplify right side
    13,185.85x = 131,340,431.26
  5. Step 5: Solve for x
    x = 131,340,431.26/13,185.85
  6. Step 6: Final answer
    x = 9,960.71

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Double scale
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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.