Home / 13,180.89-18,190.13-7,213.08

Finding the Fourth Proportional to 13,180.89, 18,190.13 and 7,213.08

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Solution

The fourth proportional to 13,180.89, 18,190.13 and 7,213.08 is: 9,954.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,180.89 : 18,190.13 = 7,213.08 : x
  2. Step 2: Convert to fraction form
    13,180.89/18,190.13 = 7,213.08/x
  3. Step 3: Cross multiply
    13,180.89x = 18,190.13 × 7,213.08
  4. Step 4: Simplify right side
    13,180.89x = 131,206,862.90
  5. Step 5: Solve for x
    x = 131,206,862.90/13,180.89
  6. Step 6: Final answer
    x = 9,954.33

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Half scale
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Double scale
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Similar ratio
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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.