Home / 13,181.42-18,190.42-7,213.08

Finding the Fourth Proportional to 13,181.42, 18,190.42 and 7,213.08

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Solution

The fourth proportional to 13,181.42, 18,190.42 and 7,213.08 is: 9,954.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,181.42 : 18,190.42 = 7,213.08 : x
  2. Step 2: Convert to fraction form
    13,181.42/18,190.42 = 7,213.08/x
  3. Step 3: Cross multiply
    13,181.42x = 18,190.42 × 7,213.08
  4. Step 4: Simplify right side
    13,181.42x = 131,208,954.69
  5. Step 5: Solve for x
    x = 131,208,954.69/13,181.42
  6. Step 6: Final answer
    x = 9,954.08

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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.